Unlock instant, AI-driven research and patent intelligence for your innovation.

Motor drive device

A driving device and motor technology, applied in the direction of AC motor control, electrical components, control systems, etc.

Inactive Publication Date: 2010-05-26
FUJI ELECTRIC CO LTD
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0031] However, in a direct conversion device such as a matrix converter, the method of generating PWM pulses is different from that of a converter, so it is difficult to directly apply this prior art to a direct conversion device.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Motor drive device
  • Motor drive device
  • Motor drive device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0065] Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[0066] first, figure 1 is a block diagram showing the first embodiment of the present invention according to the first aspect and the second aspect, and Figure 5 with Image 6 Structural elements having the same function are assigned the same numbers, and their descriptions are omitted, and the following description will focus on the parts that are different from them.

[0067] exist figure 1 Among them, 1 is a matrix converter as an AC-AC direct conversion device, which is composed of a plurality of bidirectional switches directly connecting the power supply 102 and the motor 104 . For example, when the power supply 102 is a three-phase AC power supply and the motor 104 is a three-phase synchronous motor, a total of nine bidirectional switches are connected between the input and output terminals of the three phases. Semiconductor switching elements such as IGBTs ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention provides an electric motor driving mechanism. In an AC / AC direct conversion device, the fluctuation caused by the rapid variation of the motor current is not produced, during driving orbraking, the motor current can be reduced, and the conversion device can have a safe and continuous operation. A motor drive using AC / AC direct conversion devices such as a matrix converter to drive the motor, includes a current testing unit 106 for testing motor current; a comparison unit 107 for detecting whether the motor current testing value exceeds the limitation level; a induction voltage calculating unit 2 for calculating the induction voltage of the motor; when the comparison unit 107 detects that the motor current testing value exceeds the limitation level, the induction voltage calculated by the induction voltage calculating unit is taken as an output voltage instruction value which is provided to a switch unit 109 and a PWM generating unit 101 of a matrix converter 1.

Description

technical field [0001] The present invention relates to a motor driving device for driving a motor by converting multi-phase AC voltage into a multi-phase AC voltage of arbitrary magnitude and frequency by using an AC-AC direct conversion device such as a matrix converter, and particularly relates to limiting the amplitude of the motor current, thereby A motor drive device capable of continuous operation while preventing overheating and damage to the motor or power conversion device. Background technique [0002] When the electric motor is operated by a power conversion device represented by an inverter and a matrix converter, a protection device is provided to prevent overheating and damage to the motor or the power conversion device. The amplitude of the motor current, and when the motor current exceeds the limit level, all the semiconductor switching elements constituting the power conversion device are turned off to stop the operation. [0003] However, if the operation...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): H02P27/02H02P27/06
Inventor 佐藤以久也小高章弘
Owner FUJI ELECTRIC CO LTD