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Motor drive device and heat pump device using the motor drive device

A driving device and motor technology, applied in the direction of electronically commutated motor control, single motor speed/torque control, heat pump, etc., can solve problems such as difficult voltage detection, achieve power consumption suppression, realize miniaturization, and reduce components The effect of specification

Inactive Publication Date: 2016-01-27
DAIKIN IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, the method of estimating the fan speed from the voltage between the motor terminals is easily affected by GND potential fluctuations and common mode (commonmode) potential fluctuations, and it is difficult to perform voltage detection stably.

Method used

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  • Motor drive device and heat pump device using the motor drive device
  • Motor drive device and heat pump device using the motor drive device
  • Motor drive device and heat pump device using the motor drive device

Examples

Experimental program
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Embodiment Construction

[0081] Embodiments of the present invention will be described below with reference to the drawings. And the following embodiments are specific examples of the present invention, and are not intended to limit the technical scope of the present invention.

[0082] (1) Summary

[0083] figure 1 It is a block diagram showing the overall configuration of the system 100 using the motor drive device according to one embodiment of the present invention and the internal configuration of the motor drive device 20 . exist figure 1 Among them, the fan motor 51 is mounted on the outdoor unit 10 of the heat pump device (see figure 2 ) brushless DC motor for driving the outdoor fan 15. The motor drive device 20 is also mounted in the outdoor unit 10 .

[0084] (1-1) Outdoor unit 10

[0085] figure 2 It is a configuration diagram of the outdoor unit 10 of the heat pump device. exist figure 2 Among them, the outdoor unit 10 is an outdoor unit of a heat pump water heater, and has a ...

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Abstract

The invention provides a motor driving device and a heat pump device using the motor driving device, which can maintain the before-starting motor rotating speed without being influenced by the DC bus GND potential changes and common-mode potential changes. A rotating speed estimation part (28) in the motor driving device (20) estimates the rotating speed of a fan motor (51) according to the detection value of a winding voltage detection part (27) before the fan motor (51) is started. When the estimated rotating speed of the fan motor (51) is judged by a microcomputer (30) to be below a preset rotating speed, then the driving voltage is output to the fan motor (51). When the estimated rotating speed of the fan motor (51) is judged by the microcomputer (30) to be over the preset rotating speed, then the driving voltage is not output to the fan motor (51).

Description

technical field [0001] The present invention relates to motor drives. Background technique [0002] The outdoor unit of the heat pump device is equipped with an outdoor fan and an outdoor heat exchanger for exchanging heat between the refrigerant and the air by blowing air from the outdoor fan. As the driving source of the outdoor fan, for example, a brushless DC electric motor. [0003] In such an outdoor unit as above, the outdoor fan may start to rotate due to wind or the like before the motor is started. In this case, air is sent to the outdoor heat exchanger, so it is not necessary to drive the motor. Therefore, it is desirable to grasp the motor speed before starting. [0004] As a method of grasping the motor rotation speed before starting, for example, Patent Document 1 (Japanese Patent Application Laid-Open No. 7-337080) discloses it. [0005] According to the above-mentioned Patent Document 1, the rotational speed of the fan before starting is estimated based on...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P6/00F25B30/02H02P6/16F25B49/02H02P6/06H02P6/08H02P6/17
Inventor 佐藤俊彰
Owner DAIKIN IND LTD
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