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Motor drive device working as a combined charge controller simultaneously

A driving device and motor technology, which is applied in battery/fuel cell control devices, electronic commutation motor control, power consumption devices, etc., can solve the problem of unpublished and other problems, and achieve the effect of reliable switching

Inactive Publication Date: 2009-02-11
HITACHI LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the above-mentioned Patent Document 1, the operation modes of the inverter include: a motor driving mode in which an external AC power source is not connected; Since the semiconductor switching elements of the inverter perform different actions, some mechanisms must be used to judge the connection status of the external AC power supply, but this document does not disclose

Method used

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  • Motor drive device working as a combined charge controller simultaneously
  • Motor drive device working as a combined charge controller simultaneously
  • Motor drive device working as a combined charge controller simultaneously

Examples

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Embodiment 1

[0017] FIG. 1 shows a motor drive device serving also as a charge control device for a secondary battery according to this embodiment. In FIG. 1 , the positive and negative ends of a smoothing capacitor 4 are connected to a voltage detector 5 . The positive electrode of smoothing capacitor 4 is connected to the positive electrode of secondary battery 1 , and the negative electrode of secondary battery 1 is connected to the negative electrode of smoothing capacitor 4 via charging current detector 6 . The positive pole of the smoothing capacitor 4 is connected to the positive side P of the DC bus of the inverter 2, and the negative side N1 of the DC bus of the inverter 2 is connected to the smoothing capacitor via a current detector 7 that detects the current flowing in the inverter 2. 4 for the negative connection.

[0018] The inverter 2 is composed of, for example, three upper and lower bridge arms having power semiconductor switching elements Tr1-Tr6 such as IGBTs or power ...

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PUM

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Abstract

A voltage detector (11) is connected to a connection terminal (12) connected to one phase U of an AC output U V, W of an inverter (2) through a diode (10). A removable charge power supply (14) is connected to said connection terminal (12) and another connection terminal (13). A charge-power-supply connection judging circuit (16) judges whether the charge power supply (14) is or isn't connected, based on a charge power supply voltage detected by a voltage detector (11). A mode change control circuit (17) outputs switch signal (17S1 or 17S2) by the result of said judgment. By receiving this switch signal, the inverter controller (15) switches the operation of the inverter (2) between the Motor Drive mode or the Battery Charge mode. Thereby, a motor drive device detects a connecting status of an external charge power supply (14) and steadily switches the operation of the inverter (2) between the Motor Drive mode or the Battery Charge mode.

Description

technical field [0001] The present invention relates to a motor drive device that drives a motor using a secondary battery as a power source, and particularly relates to a motor drive device suitable for controlling charging of a mounted secondary battery. Background technique [0002] In a motor drive device using a secondary battery as a power source, a dedicated booster circuit and a rectifier circuit are provided for charging the secondary battery, or as disclosed in Patent Document 1, a dedicated booster circuit for a charging circuit is not used, On the other hand, the inverter device for driving the motor is used to cut and cut the winding of the motor to boost the voltage. [0003] [Patent Document 1] Japanese Unexamined Patent Publication No. 7-87616 (Fig. 1, description in paragraph (0012), description in paragraph (0021)) [0004] In the above-mentioned Patent Document 1, the operation modes of the inverter include: a motor driving mode in which an external AC po...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P6/00H02P27/00H02J7/00H02P6/16H02P6/18H02P27/06
CPCH02J7/1415H02J7/14B60L11/1851Y02T10/705H02M7/5395Y02T10/7005H02M2001/0009H02J7/1407B60L2220/54Y02T10/641B60L58/10Y02T10/64Y02T10/70H02M1/0009
Inventor 青柳滋久远藤常博白滨秀文伊藤佳树
Owner HITACHI LTD