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motor drive

A driving device, motor technology, applied in the direction of motor control, AC motor control, electrical components, etc., can solve the problems of low impedance, large fault current, excessive output current, etc.

Active Publication Date: 2016-01-20
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In such a conventional motor drive device, the high voltage VDC is not applied to the control power supply 102 through the backflow prevention diode D1, but when the control power supply input terminal of the control circuit 104, which is the load of the control power supply 102, is damaged or the like, the impedance of the control power supply input terminal becomes significant. fall, the fault current from the control power supply 102 becomes excessive
Moreover, the control power supply 102 must continuously output an excessive current, so there is a problem that the components of the control power supply 102 may be damaged.
[0006] The purpose of the present invention is to prevent the load of the control power supply from becoming low impedance due to the damage of the motor drive circuit, thereby generating excessive fault current and causing the failure of the control power supply

Method used

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Embodiment approach 1

[0028] figure 1 It is a configuration diagram of a motor drive device according to Embodiment 1 of the present invention. Such as figure 1 As shown, the motor drive device has a winding L for driving the motor 1 , L 2 , L 3 The motor drive circuit 1 that is energized and driven, and the main power source 4 and the control power source 5 that are power sources that supply DC power to the motor drive circuit 1. In addition, in this embodiment, an example in which the motor drive device includes a microcomputer 6 to control the motor drive circuit 1 is given. In addition, the motor drive device drives the motor to rotate, and the motor has a motor drive winding L 1 , L 2 , L 3 A stator (not shown) and a rotor (not shown) arranged to face the stator and free to rotate.

[0029] The motor drive circuit 1 has an inverter unit 2 and a control unit 3 as main components. The output terminal of the inverter unit 2 and the motor drive winding L 1 , L 2 , L 3 When connected, the control un...

Embodiment approach 2

[0041] image 3 It is a configuration diagram of a motor drive device according to Embodiment 2 of the present invention. Such as image 3 As shown, the motor drive device of the present embodiment, like the first embodiment, includes a winding L for driving the motor 1 , L 2 , L 3 A motor drive circuit 1, a microcomputer 6, a main power source 4, and a control power source 5 that are energized and driven. In addition, in this embodiment, the upper device side electric board 9 is configured to include a microcomputer 6, a main power source 4, and a control power source 5.

[0042] In the upper equipment side electrical board 9, the main power source 4 is composed of a rectifier 10 and an electrolytic capacitor 11, which rectifies and smoothes the AC voltage from the commercial power source 8 as a commercial AC power source to output a DC output voltage V DC . The control power supply 5 is composed of a DC / DC converter 13 as a voltage conversion unit and a transistor Q 0 Structur...

Embodiment approach 3

[0050] Figure 5 It is a configuration diagram of a motor drive device according to Embodiment 3 of the present invention. Such as Figure 5 As shown, the motor drive device of this embodiment is the same as that of the second embodiment. 1 , L 2 , L 3 A motor drive circuit 1 that performs energization driving and an upper-level device-side electrical board 9 including a microcomputer 6, a main power source 4, and a control power source 5 are configured. In the motor drive device of this embodiment, except that the control power input terminal Vc of the inverter section 2 in the motor drive circuit 1 is provided with a resistor R as a first resistor 1 Otherwise, the configuration is the same as that of the motor drive device of the second embodiment, and the description of the same components is omitted.

[0051] Image 6 It is an operation explanatory diagram of the motor drive device according to the third embodiment of the present invention, and shows an example including the o...

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Abstract

The present invention provides a motor driving device which is provided with the following components: an inverter part in which the voltage from a control power supply is input for supplying electric power from a main power supply to a driving winding of the motor; and a control part which generates an energizing signal to the inverter part while the control power supply is used as an electric power source, wherein, a circuit protection component is equipped at an electric power supply line of the control power supply, thereby protecting the control power supply when the load of the control power supply is shorted.

Description

Technical field [0001] The present invention relates to a motor drive device used for a blower such as an air conditioner, and more particularly, to a technology for preventing the failure of the motor drive device from being damaged and spreading to higher-level equipment. Background technique [0002] Conventionally, as a motor drive device for a blower used in an air conditioner, the following motor drive devices are known: a DC power source supplied from the outside as a power source for the windings of the motor, and a power source for each component of the drive device The control power supply and the operation command to the motor function to output the rotation signal of the motor to the outside (for example, refer to Patent Document 1). [0003] Figure 15 It is an overall configuration diagram of a conventional example of a motor drive device. This conventional motor drive device consists of a control circuit 104, a power switching element 105, backflow prevention diodes ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02H3/08H02P27/06H02P27/08H02P29/00
Inventor 坪内俊树细川智也加藤康司
Owner PANASONIC CORP
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