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Inverter Unit

A technology of inverters and capacitors, applied in the field of inverter devices, can solve problems such as motor output reduction and achieve the effect of ensuring output

Active Publication Date: 2017-07-04
TOYOTA IND CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if switching from three-phase line-to-line modulation mode to two-phase line-to-line modulation mode, the output of the motor decreases

Method used

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Embodiment Construction

[0018] Hereinafter, one embodiment will be described in detail with reference to the drawings. In addition, in the description of the drawings, the same reference numerals are attached to the same or equivalent elements, and overlapping descriptions are omitted.

[0019] figure 1 It is a circuit diagram of a power supply circuit including an inverter device according to one embodiment. figure 1 The illustrated inverter device 1 converts DC power from a battery 3 into AC power, supplies the AC power to a motor 5 that is a rotating electrical machine, and drives the motor 5 . The power supply circuit is mounted on vehicles such as forklifts, for example.

[0020] Such as figure 1 As shown, the inverter device 1 includes: a capacitor 10, an inverter circuit 12, a drive circuit 14, a CPU (control unit) 16, a first temperature sensor (first temperature detection unit) 18, a first current sensor (current detection unit) part) 20, second current sensor 22, third current sensor 24...

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Abstract

An inverter unit 1 includes a first temperature detector 18 that detects a first temperature of at least one of semiconductor elements and a periphery of the semiconductor elements, current detectors 20,22,24 that detect a current of a motor 5, and a controller 16 that switches a modulation mode of the motor to a two-phase modulation mode or a three-phase modulation mode on the basis of a detection result of the first temperature by the first temperature detector and detection results of the current by the current detectors.

Description

technical field [0001] The present invention relates to inverter devices. Background technique [0002] As a conventional inverter device, for example, a device described in Patent Document 1 (JP-A-2007-288858) is known. The inverter device described in Patent Document 1 includes a switching unit that converts a DC voltage into an AC voltage by switching the DC voltage and supplies three AC voltages to each phase of a three-phase motor. In this inverter device, it is equipped with: a temperature detection unit, which detects the temperature of the switching unit; and an inter-line modulation control unit, which controls the switching unit based on the detected temperature of the temperature detection unit, thereby performing a three-phase motor. Three-phase line-to-line modulation mode in which all three-phase supply voltages are switched in parallel, and two-phase line-to-line modulation mode in which only two phase supply voltages of a three-phase motor are switched in pa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P27/08
CPCH02P27/08H02P27/085H02M1/32H02M7/5395H02P29/68Y02B70/10H02M1/0054H02M1/0032H02M1/327
Inventor 蟹江直人绀谷一善松本尚能
Owner TOYOTA IND CORP