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Overcurrent protection type power drive circuit and motor drive circuit

A power drive circuit and overcurrent protection technology, which is applied in the direction of protection against overcurrent, can solve problems such as overcurrent damage to controller motor windings

Active Publication Date: 2020-09-15
佛山中锦微电科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Therefore, in actual use, there are still a large number of controllers and even motor windings that suffer from overcurrent damage

Method used

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  • Overcurrent protection type power drive circuit and motor drive circuit
  • Overcurrent protection type power drive circuit and motor drive circuit
  • Overcurrent protection type power drive circuit and motor drive circuit

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] Such as figure 1 Shown is a block diagram of an overcurrent protection type power drive circuit provided by an embodiment of the present invention.

[0060] This embodiment provides an overcurrent protection type power drive circuit, including a pulse leading edge detection unit 101, a gate upper arm control circuit 102, a gate lower arm control circuit 103, a gate negative voltage control circuit 104, a power unit 105 and Feedback unit 106, wherein:

[0061] The pulse edge detection unit 101 includes an input terminal and an output terminal, and the input terminal is connected to the input terminal in1 of the overcurrent protection type power drive circuit,

[0062] The gate upper arm control circuit 102 includes an input terminal and an output terminal, the input terminal is connected to the input terminal in1 of the overcurrent protection type power drive circuit,

[0063] The gate lower arm control circuit 103 includes an input terminal, a grid negative voltage ac...

Embodiment 2

[0096] Such as image 3 As shown, it is a block diagram of an overcurrent protection type power drive circuit including an upper transistor and its control circuit provided by the embodiment of the present invention.

[0097] The present invention also provides an overcurrent protection type power drive circuit, which also includes: an upper tube power unit 108 and an upper tube grid control unit 107, the upper tube power unit 108 includes an input terminal, an output terminal and a positive terminal, and the upper tube grid The control unit 107 includes an upper tube drive pulse input terminal in22, an output terminal and a pump power input terminal Vh, wherein,

[0098] The output end of the upper tube power unit 108 is connected to the output end of the power unit 105, the input end of the upper tube power unit 108 is connected to the output end of the upper tube grid control unit 107, and the positive end is connected to the main power drive circuit of the overcurrent prot...

Embodiment 3

[0116] Such as Figure 5 As shown, the cold junction drive type three-phase motor drive circuit (500) provided by the embodiment of the present invention includes three overcurrent protection type power drive circuits to form a three-phase overcurrent protection type power drive circuit,

[0117] The three-phase overcurrent protection type power drive circuit is the first phase overcurrent protection type power drive circuit, the second phase overcurrent protection type power drive circuit and the third phase overcurrent protection type power drive circuit, wherein:

[0118] The first phase overcurrent protection power drive circuit includes a pulse front edge detection unit 101, a grid upper arm control circuit 102, a grid lower arm control circuit 103, a grid negative voltage control circuit 104, a power unit 105 and a feedback unit 106, wherein :

[0119] The pulse edge detection unit 101 includes an input terminal and an output terminal, and the input terminal is connecte...

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PUM

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Abstract

The invention discloses an overcurrent protection power drive circuit. A control pulse is input into a pulse leading edge detection unit 101, a gate upper arm control circuit 102 and a gate negative voltage control circuit 104; a gate lower arm control circuit 103 is cut off through leading edge detection, and meanwhile, the gate upper arm control circuit 102 outputs high level, so that a power unit 105 conducts load current; a power trigger formed by the gate lower arm control circuit 103, the power unit 105 and a feedback unit 106 is self-locked in a set state through the feedback unit 106;when pulse low level is input, the gate upper arm control circuit 102 is cut off, the gate negative voltage control circuit 104 drives a gate to connect negative voltage through the gate lower arm control circuit 103, so that the power unit 105 cuts off the load current and the power trigger is self-locked in a reset state through the feedback unit 106; and when a power tube has overcurrent, the power trigger is reset and locked through the feedback unit due to a saturation voltage drop of the power tube, and the power tube is protected.

Description

technical field [0001] The invention belongs to the technical field of motor control, and relates to an overcurrent protection type power drive circuit and a motor drive circuit. Background technique [0002] With the development of industrial technology, the requirements for motor control are getting higher and higher. Most motors use an electronic control unit (controller) to control the motor, not only to control its startup and operation, but also to precisely control its speed, torque, power, braking, etc. Especially with the improvement of international environmental protection requirements, electric vehicles, micro electric vehicles, electric tricycles, and electric two-wheelers using clean energy will all need to use electronic control units to optimize and precisely control the motors in the future. [0003] When the vehicle is running, its safety is very important for the safety of the vehicle property and even personal safety. Because, during the operation of th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02H3/08
Inventor 杨明
Owner 佛山中锦微电科技有限公司