Constant Current(Current Limited) Module

  I. Brief Introduction

 Intelligent controlling constant current thyristor modules can regulate voltage and smooth down current, which have inner automatic regulating circuits, thyristor and phase-shift triggering circuits, current sample circuits and current regulating circuits.

Product Features:

1. Advanced technics and high quality

 Using DCB(Direct Copper Bonded Ceramic Substrates) technics and import high performance chips and it makes the modules have long life time and up to 10,000 times of thermal cycling loader.

 2. Easy and safe opeation

(1) Using 0-10V(or 0-12V) DC signal can regulate the output voltage and current smoothly.

(2) Easily controlled by hand, instrument or microprocessor.

(3) Triggering circuit systems and thyristors and thermal conductive bagaplates are isolated each other and the insulated strength is greater than 2500V.

(4) No limited for phase series in AC input of 3-phase modules.

(5) Suitable for resistance load

II. Product Type

Intelligent controlling thyristor modules have two types: common constant current modules and special constant current modules. The precision of common constant current modules is less than 3 percent . The precision of special constant current models is greater than that of common constant current modules because of their specific design and high current sample precision.

Specifications and types of common constant current modules, see table 1 and table 2.

Table   1 

Name

Type

Specification

3-phase rectifier constant current

MZKSZLWL2400

2400A 450V

MZKSZLWL1800

1800A 450V

MZKSZLWL1200

1200A 450V

MZKSZLWL800

800A 450V

MZKSZLWL600

600A 450V

MZKSZLWL400

400A 450V

MZKSZLWL200

200A 450V

MZKSZLWL100

100A 450V

MZKSZLWL50

50A 450V

MZKSZLWL25

25A 450V

3-phase AC constant current modules

MZKSJLWL1800

3×1800A 450V

MZKSJLWL1350

3×1350A 450V

MZKSJLWL900

3×900A 450V

MZKSJLWL600

3×600A 450V

MZKSJLWL450

3×450A 450V

MZKSJLWL300

3×300A 450V

MZKSJLWL150

3×150A 450V

MZKSJLWL75

3×75A 450V

MZKSJLWL40

3×40A 450V

MZKSJLWL20

3×20A 450V

Single-phase rectifier constant current

modules

 

MZKDZLWL2400

2400A 450V

MZKDZLWL1800

1800A 450V

MZKDZLWL1200

1200A 450V

MZKDZLWL800

800A 450V

MZKDZLWL600

600A 450V

MZKDZLWL400

400A 450V

MZKDZLWL200

200A 450V

MZKDZLWL100

100A 450V

MZKDZLWL50

50A 450V

MZKDZLWL25

25A 450V

 

 

Table  2

Name

Type

Specification

Single-phase AC constant current modules

MZKDJLWL1800

1800A 450V

MZKDJLWL1350

1350A 450V

MZKDJLWL900

900A 450V

MZKDJLWL600

600A 450V

MZKDJLWL450

450A 450V

MZKDJLWL300

300A 450V

MZKDJLWL150

150A 450V

MZKDJLWL75

75A 450V

MZKDJLWL40

40A 450V

Note

1In specification volume, the current is the maximal DC average current or AC virtual current. The voltage is the maximal input virtual line voltage.

2Special constant current models are only made to order and the current value and precision are complied by customers.

 

III. Module Parameters

1Module Main Parametersinclude common parameters and parameters of table 3 and table 4

 (1) Operating frequency: 50HZ
(2) Input line voltage Vi
n(RMS) range: 30-450V(AC)
(3) Control voltage VCON  range:  0-10V(DC)

(4) Control current: 10μA

(5) Unbalanced degree of output voltage: 6

(6) Temperature coefficient of output voltage: 600PPM/℃

(7) Insulation voltage VISO(RMS): >2500V

 Table  3

Type

Output Voltage

Maximal Input Current per phase

Maximal Output Current

Triggering Current

Working Surface Temperature

VOUAVor VOUTRMS

IINRMS

IOUTAV or IOUTRMS

IE

Tc

V

A

A

mA

3-phase rectifier constant current

modules

MZKS-ZL-WL-2400

1.35VIN

1800

2400

400

80

MZKS-ZL-WL-1800

1400

1800

400

80

MZKS-ZL-WL-1200

960

1200

400

80

MZKS-ZL-WL-800

600

800

400

80

MZKS-ZL-WL-600

480

600

400

80

MZKS-ZL-WL-400

320

400

400

80

MZKS-ZL-WL-200

160

200

400

80

MZKS-ZL-WL-100

80

100

400

85

MZKS-ZL-WL-50

40

50

400

88

MZKS-ZL-WL-25

20

25

300

88

3-phase AC constant current modules

MZKS-JL-WL-1800

1.0VIN

1800

3×1800

400

80

MZKS-JL-WL-1350

1350

3×1350

400

80

MZKS-JL-WL-900

900

3×900

400

80

MZKS-JL-WL-600

600

3×600

400

80

MZKS-JL-WL-450

450

3×450

400

80

MZKS-JL-WL-300

300

3×300

400

80

MZKS-JL-WL-150

150

3×150

400

85

MZKS-JL-WL-75

75

3×75

400

85

MZKS-JL-WL-40

40

3×40

400

88

MZKS-JL-WL-20

20

3×20

300

88

                             

  Table  4 

Type

Output Voltage

Maximal Input Current per phase

  Maximal Output Current

Triggering Current

Working Surface Temperature

VOUTAV or VOUTRMS

IINRMS

IOUTAV or IOUTRMS

IE

Tc

V

A

A

mA

Single-phase rectifier constant current

modules

MZKD-ZL-WL-2400

0.9VIN

2666

2400

400

80

MZKD-ZL-WL-1800

2000

1800

400

80

MZKD-ZL-WL-1200

1333

1200

400

80

MZKD-ZL-WL-800

888

800

400

80

MZKD-ZL-WL-600

666

600

400

80

MZKD-ZL-WL-400

444

400

300

80

MZKD-ZL-WL-200

222

200

300

80

MZKD-ZL-WL-100

111

100

300

85

MZKD-ZL-WL-50

55

50

300

85

MZKD-ZL-WL-25

28

25

300

88

Single-phase AC constant current modules

MZKD-JL-WL-1800

1.0VIN

1800

1800

400

80

MZKD-JL-WL-1350

1350

1350

400

80

MZKD-JL-WL-900

900

900

400

80

MZKD-JL-WL-600

600

600

400

80

MZKD-JL-WL-450

450

450

400

80

MZKD-JL-WL-300

300

300

400

80

MZKD-JL-WL-150

150

150

400

85

MZKD-JL-WL-75

75

75

400

85

MZKD-JL-WL-40

40

40

400

88

2.Thyristor Chip Main Parameters   

Table 5

 Type

IT(AV)

VRRM  VDRM

ITSM

 

IRRMIDRM

Tj

di/dt

dv/dt

Tj125℃

Ts125℃

45℃10mA

Ts125℃

max

.

.

A

V

A

mA

A/μs

V/μs

MZKS-ZL-WL-800

320

12002200

8000

20

125

100

500

MZKS-ZL-WL-600

MZKS-JL-WL-600

MZKS-JL-WL-450

MZKD-ZL-WL-800

MZKD-ZL-WL-600

MZKD-JL-WL-600

MZKD-JL-WL-450

MZKS-ZL-WL-400

250

6400

15

MZKS-JL-WL-300

MZKS-ZL-WL-200

110

2200

10

MZKS-JL-WL-150

MZKD-ZL-WL-400

200

5000

15

MZKD-JL-WL-300

MZKD-ZL-WL-200

100

1800

10

MZKD-JL-WL-150

MZKS-ZL-WL-100

50

12001800

1100

10

MZKS-JL-WL-75

MZKD-ZL-WL-100

MZKD-JL-WL-75

         

IV. Forms of Electrical Connection in Modules

[

词汇翻译:

输出: Output     

输入: Input    

移相调控器:Phase-shift controller 

电流设定: Initialization current

稳流输出信号:Constant current signal output

控制信号输入: Control signal input

地:GND

]

1. Single-phase rectifier constant current modules

 

2. Single-phase AC constant current modules

 

                             

                           

   33-phase rectifier constant current modules

                        

     43-phase AC constant current modules

                           

V. Electrical Connection Forms of Module Output Load

[

词汇翻译:

输出: Output   

输入: Input   

分流器:Current tap

]

 

1Single-phase rectifier constant current modules

 

                                     

  2Single-phase AC constant current modules

                                  

  33-phase rectifier constant current modules

 

 

                

  43-phase AC constant current modules

                                         

VI. Installation and Operation of Modules   

1.Modules type selection:

Current of choosed modules must be two times than maximal current of  load in order to make equipments safely work.

2. Environment required:

Modules must be worked or stored in  places that are dried, ventilated, dusty-less and have no corrosive gases. Atmosphere temperature required varies from 25℃ to 45℃.  

3.Installation steps

(1) Install radiators and wind machines in order to accord with cooling requirement. The surface of radiators must be plat and clean. A layer of thermal conductive silica gel must be laid equably between the module thermal conductive bagaplates and the surface of radiators. Then screw modules on radiators with equal strength.

(2) Mutliple section copper wires must be used to connect with modules because of their large current. Aluminium wires are prohibited. Wire section is selected according to current density(4A/mm2). Must’t connect copper wires with module poles directly.   

(3) Tie up copper wires with junction nose rings for fear of additional quantity of heat caused by bad connection, then place insulative pyrocondensation cannula on wires and make them shrink with hot wind or water. Screw junction noses in module poles and make them connected well in their surface.

(4) Don’t lift up poles for fear of breaking off poles.

(5) Specification , color and function of control port pins, see table 6 and figure 9-10.

 

[

词汇翻译:

输出: Output      输入: Input    

电流设定: Initialization current

稳流输出信号:Constant current signal output

控制信号输入: Control signal input

地:GND

]

Fig.9  five-pin socket  specification             Fig.10  fifteen-pin socket Specification

Table  6

function

 color

  five-pins socket

fifteen-pin socket

12V

red

5

1

GND

Black

4

2

control signal input

black

3

3

constant current signal output

yellow

2

4

initialization current

orange

1

5

 

Hand controlusing resistorsinterface, computer control interface and instrument control interface, see figure 11-13.

[

翻译说明

计算机D/A输出(0-10V) computer D/A output (0-10V)

]

 

Fig.11  hand control interface        Fig.12  computer control interface

                                 

Fig.13  instrument control interfaceregulator diode: 2.4- 2.7v)

4Constant current using method

(1)Connect with constant current signal output and control signal input. The value of constant current voltage.can be changed through adjusting the resistor. Then output current we want  is constant.

(2)The output current is not constant when we disconnect constant current signal output and control signal input. Now the module works as a fully controlling voltage regulated module. Change the value of control signal input can regulate output voltage of the module through adjusting resistor. See figure 14.

 

                                  

              Fig.14  fully controlling voltage regulated connection

VII. Module Protection

1.Over-current protection

The simplest protection method is to connect quick fuses outside of modules. Quick fuses are connected in AC input sides(See figure 15-16).The rated voltage of selected quick fuses must be greater than that of working voltage in circuits. About rated voltage, see table 7.

[

翻译说明

[输出: Output     

输入: Input

]

Fig.15 3-phase modules              Fig.16 single-phase modules

Table 7  current selection of fuses

Module type

Rated current of refuses

Module type

Rated current of refuses

MZKS-ZL-WL-2400

1200

MZKD-ZL-WL-2400

960

MZKS-JL-WL-1800

MZKD-JL-WL-1800

MZKS-ZL-WL-1800

900

MZKD-ZL-WL-1800

720

MZKS-JL-WL-1350

MZKD-JL-WL-1350

MZKS-ZL-WL-1200

480

MZKD-ZL-WL-1200

480

MZKS-JL-WL-900

MZKD-JL-WL-900

MZKS-ZL-WL-800

400

MZKD-ZL-WL-800

320

MZKS-JL-WL-600

MZKD-JL-WL-600

MZKS-ZL-WL-600

300

MZKD-ZL-WL-600

240

MZKS-JL-WL-450

MZKD-JL-WL-450

MZKS-ZL-WL-400

160

MZKD-ZL-WL-400

160

MZKS-JL-WL-300

MZKD-JL-WL-300

MZKS-ZL-WL-200

80

MZKD-ZL-WL-200

80

MZKS-JL-WL-150

MZKD-JL-WL-150

MZKS-ZL-WL-100

40

MZKD-ZL-WL-100

40

MZKS-JL-WL-75

MZKD-JL-WL-75

MZKS-ZL-WL-50

25

MZKD-ZL-WL-50

25

MZKS-JL-WL-40

MZKD-JL-WL-40

MZKS-ZL-WL-25

16

MZKD-ZL-WL-25

16

MZKS-JL-WL-20

.

 

2Over-voltage protection

Resistor-capacitor absord and press-sensitive resistor method is recommended to used together in order to realize over-voltage protection.

(1)Resistor-capacitor absord circuits can restrain over-voltage produced by thyristors when they vary form connection to shutoff. It can effectively avoid breaking down of modules. About electrical circuits, see figure 17-20. About the value of resistors and capacitors, see table 8-9.

 [

翻译说明

[输出: Output     

输入: Input

]

 

                        

 Fig.17  3-phase rectifier constant current modules           Fig.18 single-phase rectifier constant current modules

                      

 Fig.19  3-phase AC constant current modules                     Fig.20 single-phase AC constant current modules

 

Table  8   

name

type

RΩ/W

CμF/630V

quantity

3-phase rectifier constant current modules

MZKS-ZL-WY-2400

4/20

0.68

each 18

MZKS-ZL-WY-1800

MZKS-ZL-WY-1200

MZKS-ZL-WY-800

each 6

MZKS-ZL-WY-600

MZKS-ZL-WY-400

MZKS-ZL-WY-200

8/10

0.32

each 6

MZKS-ZL-WY-100

30/6

0.22

each 6

MZKS-ZL-WY-50

60/3

0.22

each 6

MZKS-ZL-WY-25

3-phase AC constant current modules

MZKS-JL-WY-1800

4/20

0.68

each 9

MZKS-JL-WY-1350

MZKS-JL-WY-900

MZKS-JL-WY-600

each 3

MZKS-JL-WY-450

MZKS-JL-WY-300

MZKS-JL-WY-150

8/10

0.32

each 3

MZKS-JL-WY-75

30/6

0.22

each 3

MZKS-JL-WY-40

60/3

0.22

each 3

MZKS-JL-WY-20

Table  9                                      

name

type

RΩ/W

CμF/630V

quantity

single-phase rectifier constant current modules

MZKD-ZL-WY-2400

4/20

0.68

each 12

MZKD-ZL-WY-1800

MZKD-ZL-WY-1200

MZKD-ZL-WY-800

each 4

MZKD-ZL-WY-600

MZKD-ZL-WY-400

MZKD-ZL-WY-200

8/20

0.32

each 4

MZKD-ZL-WY-100

30/6

0.22

each 4

MZKD-ZL-WY-50

60/3

0.22

each 4

MZKD-ZL-WY-25

single-phase AC constant current modules

MZKD-JL-WY-1800

4/20

0.68

each 3

MZKD-JL-WY-1350

MZKD-JL-WY-900

MZKD-JL-WY-600

each 1

MZKD-JL-WY-450

MZKD-JL-WY-300

MZKD-JL-WY-150

8/10

0.32

each 1

MZKD-JL-WY-75

30/6

0.22

each 1

MZKD-JL-WY-40

60/3

0.22

each 1

 

(2) Press-sensitive resistors can absorb over-voltage which have more energy and last more time produced by thunder. About electrical circuits, see figure 21-22.The voltage value in press-sensitive resistors varies from 710V to 1000V, that is 710≤V1mA1000V.

   [

翻译说明

[输出: Output     

输入: Input

]

 

           

                

 Fig.21  3-phase circuits           Fig.22 single-phase circuits

               

    3. Selection of radiators

Radiators must be used during modules work because modules will produce much heat caused by the voltage difference in modules. Reliability and safety are directly depended on conditions of heat emanating.   

Generally, there are three ways of heat emanating: water-cooling, forced wind-cooling and natural cooling. In the first place water-cooling is choosed for it’s good cooling effectivity if we can use. Forced wind-cooling is the commonest way used to emanate heat ,but wind velocity of axis stream wind machines must be great than 6m/s. Natural cooling is seldom used because of its bad cooling effectivity and large cubage. We must make air convect better surround radiators if natural cooling is used.

We list types and length of radiators that required by different types of modules when modules work in condition of rated current and 40℃ atmosphere temperature so that a reference is given for customers. The length of radiator may reduce if modules work below full-load.

Table 10 selection of radiators

Module type

Radiator type

Rediator lengthmm

Axis stream wind machine

Forced wind-cooling

Natural cooling

 

MZKS-ZL-WL-2400

DXC573

1800

.

AC220V/50Hz/100w

MZKS-JL-WL-1800

MZKS-ZL-WL-1800

1200

.

MZKS-JL-WL-1350

MZKS-ZL-WL-1200

900

.

AC220V/50HZ/44w

220×220×60

MZKS-JL-WL-900

MZKD-ZL-WL-2400

MZKD-JL-WL-1800

 

780

.

 

MZKD-ZL-WL-1800

MZKD-JL-WL-1350

 

MZKD-ZL-WL-1200

MZKD-JL-WL-900

                                      

Table  11

Module type

Radiator type

Rediator lengthmm

Axis stream wind machi

Forced wind-cooling

Natural cooling

MZKS-ZL-WL-800

DXC573

600

.

AC220V/50Hz/44W

220×220×60

MZKS-JL-WL-600

MZKS-ZL-WL-600

400

.

MZKS-JL-WL-450

MZKS-ZL-WL-400

300

.

MZKS-JL-WL-300

MZKD-ZL-WL-800

MZKD-JL-WL-600

MZKD-ZL-WL-600

260

.

MZKD-JL-WL-450

MZKS-ZL-WL-200

DXC578

300

.

AC220V/50Hz/38W

172×150×51

MZKS-JL-WL-150

MZKD-ZL-WL-400

MZKS-ZL-WL-100

200

.

MZKS-JL-WL-75

MZKD-JL-WL-300

MZKD-ZL-WL-200

MZKS-JL-WL-40

160

.

AC220V/50Hz/10W

120×120×38

MZKS-ZL-WL-50

MZKD-ZL-WL-100

MZKD-JL-WL-150

MZKS-ZL-WL-25

.

120

.

MZKS-JL-WL-20

.

.

MZKD-JL-WL-75

.

.

MZKD-ZL-WL-50

.

.

MZKD-ZL-WL-25

.

.

MZKD-JL-WL-40

DXC-721

.

80

.

MZKD-JL-WL-20

.

.

   

About shape and dimension of radiators, see figure 23-24.                     

 

      

Fig.23  DXC-578

                                 

Fig.24 DXC-573

VIII. Note                       

1.Modules are commonly prohibited to work with large current when voltage is small. If we do so it will make modules produce more heat and maybe destroy modules because the lead angle is small. The virtual current value is not large even through the peak current value of  thyristors is very large. It is recommended that modules work with large current in the condition of a large lead angle.

2.The signal input voltage of common constant current modules varies from 0V to 10V(or 012V).It can be gotten directly from the center junction of a resistor when the resistor is connected to a 12V power supply.

3. The temperature of modules(measurement points are in the surfaces of radiators which contact with bagaplates of modules tightly and are near the center of modules)should be less than 70℃ when modules work in a stable thermal status, otherwise it will destroy modules.

4.Control port required: voltage of power supply is 12V and current is great than 1A.Pay attention not to connect reversely, otherwise it will destroy modules. Resistor value is 10KΩ and the power is greater than 1W.

5.Don’t use modules to isolate electric network and people bodies. Air switchs should be installed before modules to ensure people’s safety.

6. Take and lay modules lightly to avoid strong knock and shock when modules are transferred and installed.

7. The content of charts and tables in this specification is only a reference for customers.

  Append: Shape and dimension of radiators(mm)

Table 12                               

Module type

L1

L2

L3

B1

B2

B3

h

4-Φ6-Φ

MZKS-ZL-WL-2400

74

160

185

129

195

220

70

8.5

MZKS-JL-WL-1800

MZKS-ZL-WL-1800

MZKS-JL-WL-1350

MZKD-ZL-WL-2400

MZKD-JL-WL-1800

MZKD-ZL-WL-1800

MZKD-JL-WL-1350

MZKS-ZL-WL-800

MZKS-JL-WL-600

MZKS-ZL-WL-600

MZKS-JL-WL-450

MZKD-ZL-WL-800

MZKD-JL-WL-600

MZKD-ZL-WL-600

MZKD-JL-WL-450

 

MZKS-ZL-WL-200

74

154

174

74

99

120

68

8.5

MZKS-JL-WL-900

MZKD-ZL-WL-1200

MZKD-JL-WL-900

MZKS-ZL-WL-400

MZKS-JL-WL-300

MZKD-ZL-WL-400

MZKD-JL-WL-300

MZKS-ZL-WL-200

40

102

116

41

60

74

41

6.2

MZKS-JL-WL-150

MZKD-ZL-WL-200

MZKD-JL-WL-150

MZKS-ZL-WL-100

32

79

92

32

48

61

42

5.2

MZKS-JL-WL-75

MZKD-ZL-WL-100

MZKD-JL-WL-75

MZKS-ZL-WL-50

MZKS-JL-WL-40

MZKD-ZL-WL-50

MZKD-JL-WL-40

MZKS-ZL-WL-25

MZKS-JL-WL-20

MZKD-ZL-WL-25