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Surge protection circuit, motor controller and household appliance

A motor controller and surge protection technology, which is applied in the direction of AC motor control, emergency protection circuit devices, control systems, etc., can solve the problems of motor controller damage, high cost, and large-capacity bus electrolytic capacitors, etc., to achieve The circuit structure is simple, the cost is low, and the effect of improving the surge protection ability

Pending Publication Date: 2022-04-22
MIDEA WELLING MOTOR TECH SHANGHAI
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  • Application Information

AI Technical Summary

Problems solved by technology

However, the large-capacity bus electrolytic capacitor has a large volume and high cost
For this reason, in related technologies, it is proposed to use small-capacity film capacitors to replace large-capacity bus electrolytic capacitors, but this technology will greatly reduce the surge protection capability of the motor controller, which may cause damage to the motor controller

Method used

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  • Surge protection circuit, motor controller and household appliance
  • Surge protection circuit, motor controller and household appliance
  • Surge protection circuit, motor controller and household appliance

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Embodiment Construction

[0018] Refer to the attached Figure 1-11 The surge protection circuit, the motor controller, and the home appliance according to the embodiments of the present invention are described, wherein the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions. The embodiments described with reference to the drawings are exemplary and should not be construed as limiting the present invention.

[0019] In the embodiment of the present invention, such as figure 1 As shown, the motor controller 1 includes a rectifier bridge 11 and an inverter bridge 12 , the output terminal of the rectifier bridge 11 is connected to the input terminal of the inverter bridge 12 , and the motor controller 1 is used to control the motor M.

[0020] Since the large-capacity busbar electrolytic capacitor has a large volume and high cost, the present invention uses a small-capacity film capacitor C instead of a large-capacity busbar electrolyti...

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Abstract

The invention discloses a surge protection circuit, a motor controller and a household appliance, the motor controller comprises a rectifier bridge and an inverter bridge, the output end of the rectifier bridge is connected with the input end of the inverter bridge, and the surge protection circuit comprises a first absorption unit arranged at the input end of the rectifier bridge, the primary absorption module is used for carrying out primary absorption on surge voltage applied to an alternating current input side; and the second absorption unit is arranged at the output end of the rectifier bridge, is connected with the inverter bridge in parallel and is used for deeply absorbing the surge voltage subjected to primary absorption. According to the surge protection circuit, the surge protection capability of the motor controller can be improved, and the circuit is simple in structure and low in cost.

Description

technical field [0001] The invention relates to the technical field of motors, in particular to a surge protection circuit, a motor controller and household appliances. Background technique [0002] Motor controllers powered by AC usually use large-capacity bus electrolytic capacitors to reduce bus voltage fluctuations. However, the large-capacity bus electrolytic capacitor has a large volume and high cost. For this reason, in related technologies, it is proposed to use small-capacity film capacitors to replace large-capacity bus electrolytic capacitors, but this technology will greatly reduce the surge protection capability of the motor controller, which may cause damage to the motor controller. Contents of the invention [0003] The present invention aims to solve one of the technical problems in the related art at least to a certain extent. For this reason, the present invention proposes a surge protection circuit, a motor controller and household appliances to improv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P27/06H02H9/04H02M7/5387H02M1/32
CPCH02P27/06H02H9/04H02M7/5387H02M1/32
Inventor 葛森陈辉付俊永赵小安秦向南
Owner MIDEA WELLING MOTOR TECH SHANGHAI
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