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Motor driving device

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

Active Publication Date: 2013-05-08
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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Experimental program
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Embodiment approach 1

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

[0029] The motor drive circuit 1 has an inverter unit 2 and a control unit 3 as main components, and the output terminal of the inverter unit 2 is connected to the motor drive w...

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 is the same as the first embodiment, and includes a motor drive winding L 1 , L 2 , L 3 A motor drive circuit 1 , a microcomputer 6 , a main power supply 4 , and a control power supply 5 for energized driving. In addition, in the present embodiment, the host-side electric board 9 is configured to include a microcomputer 6 , a main power supply 4 , and a control power supply 5 .

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

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 Embodiment 2, and the motor drive winding L 1 , L 2 , L 3 A motor drive circuit 1 for energizing and driving, and a host-side electric board 9 including a microcomputer 6 , a main power supply 4 , and a control power supply 5 are constituted. In the motor drive device of the present embodiment, the control power supply input terminal Vc of the inverter unit 2 in the motor drive circuit 1 is provided with a resistor R as a first resistor. 1 Other than that, the configuration of the motor drive device according to Embodiment 2 is the same, and the description of the same configuration elements will be omitted.

[0051] Figure 6 It is an explanatory diagram of the operation of the motor drive device according to Embodiment 3 of the present invention, and shows ...

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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 in blowers such as air conditioners, and in particular to a technique for preventing faults from being damaged by the motor drive device from 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 device is known: a DC power supply as a power source for the winding of the motor and a power source for each component of the drive device are externally supplied. It functions by controlling a power supply and an operation command to the motor, and outputs a 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 driving device is composed of a control circuit 104, a power switching element 105, backflow prevention diod...

Claims

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Application Information

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IPC IPC(8): H02P23/00H02P27/06H02P27/08H02P29/00
Inventor 坪内俊树细川智也加藤康司
Owner PANASONIC CORP
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