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Vehicle

A technology for vehicles and electric motors, which is applied in the field of vehicles and can solve problems such as large fluctuations in electric motor power

Active Publication Date: 2017-03-15
DENSO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the fluctuation of the reactor current becomes large, the fluctuation of the voltage of the first power line to which the inverter is connected becomes large, and the fluctuation of the power of the motor becomes large

Method used

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Embodiment Construction

[0023] Next, modes for carrying out the present invention will be described using examples.

[0024] figure 1 is a configuration diagram showing an outline of the configuration of the hybrid vehicle 20 as the first example of the present invention. figure 2 It is a configuration diagram showing a schematic configuration of an electric drive system including electric motors MG1, MG2. Such as figure 1 The illustrated hybrid vehicle 20 of the first example includes an engine 22, a planetary gear 30, electric motors MG1, MG2, inverters 41, 42, a boost converter 55, a battery 50, a system main relay 56, and Electronic control unit 70 (hereinafter, referred to as HVECU).

[0025] The engine 22 is configured as an internal combustion engine that outputs power by using gasoline, gas oil, or the like as fuel. The operation of the engine 22 is controlled by an electronic control unit 24 of the engine (hereinafter, referred to as an engine ECU).

[0026] Although not shown, the eng...

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Abstract

The invention relates to a vehicle. When an electrical primary frequency fm2 of power fluctuation of a motor is smaller than a determination threshold value fth1 that is a lower limit frequency of a frequency band where resonance occurs in a circuit including a reactor and a capacitor of a boosting converter or greater than a determination threshold value fth2 that is an upper limit frequency of the frequency band where resonance occurs, a value G2 is set as a gain G (step S140, S150) and when the electrical primary frequency fm2 is equal to or greater than the determination threshold value fth1 and equal to or smaller than the determination threshold value fth2, a value G3 at which the upper limit frequency of the resonant frequency band has a low frequency than the determination threshold value fth1 is set as the gain G (step S140, S150) and a current control in the boosting converter is executed using the gain G set in this way. The resonance of the circuit including the reactor and the capacitor of the boosting converter can be prevented.

Description

technical field [0001] The present invention relates to vehicles, and more particularly, to a vehicle including an electric motor, an inverter, a battery, and a boost converter. Background technique [0002] As this type of vehicle, a vehicle including a motor, an inverter, a battery, and a boost converter has been proposed (for example, refer to International Publication No. 2010 / 137128). The inverter drives the electric motor. The boost converter has a reactor and a capacitor, and is connected to a first power line to which the inverter is connected and a second power line to which the battery is connected. In this vehicle, by setting the target current of the reactor so that the voltage of the first power line becomes the target voltage, and controlling the step-up converter so that the reactor current flowing to the reactor becomes the target current, the second current is prevented. A power line voltage fluctuation, and controls the motor with excellent response. [...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60L11/18B60L50/13
CPCB60L2210/14B60L53/20B60L15/02B60L2240/421B60L2240/423B60L2240/441B60L2240/443B60L2240/545B60L2240/547B60L2270/145B60L50/16B60L50/61H02P6/04Y02T10/62Y02T10/64Y02T10/70Y02T10/7072Y02T90/14
Inventor 朝川幸二朗林和仁野边大悟
Owner DENSO CORP
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