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Voltage converter and vehicle having the same

A technology of voltage conversion and power storage device, applied in battery/battery traction, output power conversion device, electric vehicle, etc., to achieve the effect of improving service life and suitable capacity

Inactive Publication Date: 2009-07-15
TOYOTA JIDOSHA KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the above publication only discloses a circuit protection technology when the regenerative energy from the motor load is too much, and does not assume the case of using two DC power supplies connected in parallel to supply power to the inverter at the same time.

Method used

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  • Voltage converter and vehicle having the same
  • Voltage converter and vehicle having the same
  • Voltage converter and vehicle having the same

Examples

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no. 1 approach

[0029] figure 1 It is an overall block diagram of a hybrid vehicle shown as an example of the vehicle of the present invention. refer to figure 1 , the hybrid vehicle 100 has an engine 2 , motor generators MG1 and MG2 , a power split mechanism 4 , and wheels 6 . In addition, the hybrid vehicle 100 further includes power storage devices B1 and B2, converters 10 and 12, capacitor C, inverters 20 and 22, ECU (Electronic Control Unit: electric control unit) 30, voltage sensors 42, 44 and 46 , Current sensors 52 and 54.

[0030] This hybrid vehicle 100 runs with engine 2 and motor generator MG2 as power sources. Power split mechanism 4 is coupled to engine 2 and motor generators MG1, MG2, and distributes power among them. The power split mechanism 4 is constituted by, for example, a planetary gear mechanism having three rotation shafts of a sun gear, a planetary carrier, and a ring gear, and the three rotation shafts are connected to the rotation shafts of the engine 4 and the ...

no. 2 approach

[0069] In the first embodiment, although the carrier signal FC2 for converter 12 is phase-shifted by 180 degrees with respect to the carrier signal FC1 for converter 10 , the phase difference between carrier signals FC1 and FC2 does not necessarily need to be 180 degrees.

[0070] Figure 8 It is a functional block diagram of the inverter control unit of the second embodiment. refer to Figure 8 , the converter control unit 32A includes a phase adjustment unit 114 instead of the Figure 4 The phase inverting unit 108' in the configuration of the converter control unit 32 of the first embodiment shown is shown.

[0071] Phase adjustment unit 114 receives carrier signal FC1 from carrier generation unit 106 and signals PWC1 and PWC2 output from comparators 110 and 112 , respectively. Furthermore, the phase adjustment unit 114 outputs the carrier signal FC2 whose phase is adjusted with respect to the carrier signal FC1 so that the rising timing of the signal PWC2 is synchronize...

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PUM

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Abstract

The present invention provides a converter (10, 12), and the converters (10, 12) are connected in parallel to each other. The converter (10) raises the voltage from an accumulator (B1) according to a signal (PWC1) from an ECU (30) and outputs it to a capacitor (C). The converter (12) raises the voltage from an accumulator (B2) according to a signal (PWC2) from the ECU (30) and outputs it to the capacitor (C). The ECU (30) generates signals (PWC1, PWC2) by using carrier signals which have the same frequency and asynchronized phases and outputs the generated signals (PWC1, PWC2) to the converters (10, 12), respectively.

Description

technical field [0001] The present invention relates to a voltage conversion device and a vehicle provided with the voltage conversion device, and more particularly to a voltage conversion device provided with two parallel-connected converters and a vehicle provided with the voltage conversion device. Background technique [0002] Japanese Patent Laid-Open No. 2003-199203 discloses a circuit in which an energy storage unit is connected between a DC power supply and an inverter via a DC / DC Converter. This circuit has an inverter for driving a motor load, a smoothing capacitor for suppressing the instantaneous ripple of the DC input voltage of the inverter, a DC power supply for supplying DC voltage to the inverter, and a DC-DC converter connected in parallel to the DC power supply , A regenerative energy storage unit connected to a DC-DC converter. [0003] In this circuit, the DC input voltage of the inverter is detected, and when the detected voltage exceeds a set level, t...

Claims

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Application Information

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IPC IPC(8): H02M3/155B60L9/18B60L11/18
CPCH02M1/10H02M2001/007H02M7/493H02M2003/1586H02M2001/0012B60L11/1803Y02T10/7005B60L50/51Y02T10/70H02M1/0012H02M1/007H02M3/1586H02M1/0043
Inventor 洪远龄及部七郎斋
Owner TOYOTA JIDOSHA KK
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