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50-ampere power consumption balanced-type high-power constant-current source

A high-power, constant-current source technology, applied in the direction of emergency protection circuit devices, instruments, and electric variables for limiting overcurrent/overvoltage, can solve the problem of short service life of power devices, insufficient maximum output current, and system Low reliability and other issues, to achieve the effect of reducing the number of components and reducing design costs

Inactive Publication Date: 2013-12-25
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the shortcomings of the existing high-power constant current sources such as insufficient maximum output current, short service life of power devices, and low system reliability due to large power loss, the present invention provides a desktop constant current source for driving high-power loads. Flow source instrument, the high-power constant current source adopts a power consumption balanced structure, so that the power loss and heat are evenly distributed and discharged in time to avoid accumulation, and the redundancy of the constant current driver is enhanced, thereby improving the stability of the high-power constant current source performance, reliability and maximum output current

Method used

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  • 50-ampere power consumption balanced-type high-power constant-current source

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Embodiment 1

[0026] Embodiment 1 illustrates the overall structure of the present invention in conjunction with the accompanying drawings

[0027] The present invention has a balanced power consumption high-power constant current source, and the structure includes: a voltage control module 1, an output display module 2, a transconductance amplifier 3, and a safety protection circuit module 4. The structural block diagram is as follows: figure 1 Shown, where the output port V of the voltage control module 1 C Connected to the transconductance amplifier 3, the required constant current signal is generated by the transconductance amplifier 3 to drive the load 5, and the safety protection circuit module 4 provides safety protection for the load. At the same time, the output port V of the voltage control module 1 A and the output port V of the transconductance amplifier module 3 F It is connected to the mode selection input terminal of the output display module 2, and the output display module...

Embodiment 2

[0028] Embodiment 2 Voltage Control Module 1

[0029] Such as figure 2 As shown, voltage control module 1 includes: pin 1 of voltage reference chip U1 (MC1403) is connected to power supply VCC1 (+15V, rated power 30W), pin 3 is grounded, and pin 2 is connected to single operational amplifier U2 (OP07) through resistor R1 (15kΩ). ), pin 4 of the single op amp U2 (OP07) is grounded, pin 7 is connected to the power supply VCC1 (+15V, rated power 30W), pin 2 is grounded through the resistor R3 (30kΩ), and pin 2 of the single op amp U2 (OP07) is grounded. The pin is connected to the 6 pin of the single op amp U2 (OP07) through the resistor R2 (30kΩ), and the 6 pin of the single op amp U2 (OP07) is connected to the potentiometer R p1 (100kΩ) pin 3, potentiometer R p1 (100kΩ) pin 1 is grounded, and pin 2 is connected to the output port V of voltage control module 1 A , the output port V A Connect to the mode selection input terminal of the output display module 2, and the potent...

Embodiment 3

[0030] Embodiment 3 Transconductance amplifier 3

[0031] Such as image 3 As shown, the transconductance amplifier 3 includes: the 4-pin of the dual operational amplifier U4A (LM358) is grounded, the 8-pin is connected to the power supply VCC1 (+15V, rated power 30W), and the 2-pin is connected to the output of the voltage control module 1 through the resistor R6 (10kΩ) Port V C , connected to the control signal output port of the soft-start protection circuit in the safety protection circuit module 4, and pin 3 is connected to the output port V of the transconductance amplifier 3 through a resistor R7 (10kΩ) F At the same time, pin 3 of the dual op amp U4A (LM358) is connected to pin 1 of the dual op amp U4A (LM358) through a capacitor C1 (4.7μF), and pin 1 of the dual op amp U4A (LM358) is connected to N-type via a resistor R8 (1kΩ). Darlington Power Transistor T E (TIP132) pin 1, N-type Darlington power transistor T E (TIP132) pin 3 is connected to power supply VCC1 (+...

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Abstract

The invention discloses a 50-ampere power consumption balanced-type high-power constant-current source and belongs to the technical field of electronic equipment. The constant-current source is structurally characterized in that a voltage control module (1) generates continuous adjustable voltage signals VC for controlling a transconductance amplifier (3), the transconductance amplifier (3) generates a constant current signal for driving a load (5), a safety protection circuit module (4) provides security protection for the load, and the output port VA of the voltage control module (1) and the output port VF of the transconductance amplifier module (3) are connected to the mode selecting input end of an output display module (2). The invention provides a constant-current source for driving a high-power semiconductor laser array, and the maximum output current of the constant-current source can be up to 50 amperes; and the constant-current source is of a power consumption balanced-type structure, so that the power loss and heat are uniformly dispersed and timely discharged and then not accumulated, and the redundancy of a constant-current driver is enhanced, thereby improving the stability, reliability and maximum output current of the high-power constant-current source.

Description

technical field [0001] The invention belongs to the technical field of electronic equipment, in particular to a 50 ampere power consumption balanced high-power constant current source. Background technique [0002] With the continuous increase of power consumption and the high functionality of energy utilization, high-current technology is a field that is rapidly emerging in the generation, transmission, conversion, and control of electric energy. At the same time, as a branch of stable power supply, high-power constant current source has a very wide range of applications in the research field of power supply. However, in many occasions where a constant current source should be used, the regulated power supply is still not used properly. In most cases, the high-precision current source with large operating current still needs to be designed and realized by the user. Therefore, it is urgent to design a practical high-power constant current source, and provide complete servic...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05F1/56H02H9/02
Inventor 田小建单江东吴戈汝玉星高博
Owner JILIN UNIV
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