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Inverter device

A technology of inverters and switching devices, which is applied in the direction of circuit devices, battery circuit devices, output power conversion devices, etc., and can solve the problems of increased power loss and temperature rise of diodes

Inactive Publication Date: 2005-12-28
SANYO ELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] In this way, in the past, reverse connection countermeasures have been taken by connecting a diode to the positive line from the power supply. However, in a circuit that passes a large current like an electric compressor for an electric vehicle, there are: The power loss of the diode increases, and the temperature rise due to heat generation occurs, so it is necessary to take measures against the heat dissipation of the diode

Method used

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  • Inverter device
  • Inverter device

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Embodiment 1

[0027] figure 1 It is a power supply circuit diagram showing an air conditioner for an electric vehicle including an embodiment of the inverter device 8 of the present invention.

[0028] exist figure 1 Among them, 1 is a main battery as a DC power supply for an electric vehicle, which supplies electric power to an electric compressor 10 of an air conditioner through an inverter device 8 of the present invention. DC voltage is output from the battery 1 , but a voltage converted into a three-phase pseudo AC voltage by an inverter main circuit 12 of an inverter device 8 described later is supplied to a motor of an electric compressor 10 .

[0029] The inverter device 8 is composed of a switch device 5 composed of a switch 2 and a charging device 7 , a capacitor 11 , an inverter main circuit 12 and a control device 22 .

[0030] The inverter main circuit 12 is provided inside the mold assembly: it is constituted by switching a group of switching elements that convert the voltag...

Embodiment 2

[0051] Next, another embodiment of the inverter device 8 of the present invention will be described. figure 2 A power supply circuit diagram of the air conditioner for an electric vehicle according to this embodiment is shown. In addition, in figure 2 neutralize figure 1 Components with the same marks have the same or similar effects, and their descriptions are omitted.

[0052] exist figure 2 Among them, 41 and 42 are voltage dividing resistors for detecting the voltage of the rear stage of the switch 2 . That is, a series circuit of resistors 41 and 42 is connected between the positive line 4 and the GND line 6 at the position between the main circuit 12 subsequent to the switch 2 , and these resistors 41 and 42 constitute a voltage detection circuit 43 .

[0053] The resistance value of the resistor 41 connected to the side of the positive line 4 is sufficiently larger than the resistance value of the resistance 42 connected to the side of the GND line 6, thus, it is...

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Abstract

The present invention provides an inverter device capable of dispensing with diodes for reverse connection countermeasures of DC power supplies. The inverter device (8) is composed of a switch device (5) connected between the battery (1) as a DC power source and the inverter main circuit (12), including: the front stage of the detection switch device (5) A voltage detection circuit (18) for voltage; a control device (22) for controlling the switching device (5); a voltage input circuit (21) for inputting the voltage detected by the voltage detection circuit (18) into the control device (22). The control device (22) prohibits the closing of the switching device (5) when the voltage input from the voltage detection circuit (18) is a predetermined abnormal value.

Description

technical field [0001] The present invention relates to an inverter device configured by connecting a switching device between a DC power supply and an inverter. Background technique [0002] In recent years, as an air conditioner for an electric vehicle, an air conditioner equipped with an electric compressor driven by a battery power source has been developed. This air conditioner is composed of a battery (DC power supply), an inverter device, and an electric compressor. The inverter device includes: a switch connected to the positive electrode side of the battery; a charging device connected in parallel to the switch; and an inverter main circuit composed of a switching element group connected between the positive electrode and the negative electrode of the battery at a subsequent stage. ; The capacitors connected to the front stage of the main circuit of the inverter, etc. [0003] The switching element group of the inverter main circuit is an element for converting a ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J7/34H02M7/42H02M7/48
CPCH02J7/0034H02M1/32H02M7/48H02J7/00304H02J7/00308
Inventor 久保守
Owner SANYO ELECTRIC CO LTD