Electrically powered vehicle, control device for electrically powered vehicle, and computer readable medium

• US 8,091,666 B2
• Filed: 11/10/2009
• Issued: 01/10/2012
• Est. Priority Date: 11/11/2008
• Status: Active Grant

• Current Assignee: DENSO Corporation
• Original Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Inventors: Nozawa, Natsuki, Hamatani, Takashi
• Primary Examiner(s): PHAN, HAU VAN
• Application Number:
  US12/615,494
• Publication Number:
  US 20100116575A1
• Time in Patent Office: 791 Days
• Field of Search: 180/65.265, 180/65.275, 180/65.245, 180/62.285, 180/165, 180/168, 180/170, 701/22, 701/99, 701/20, 323/271, 323/223, 323/235, 318/433, 318/434, 318/139, 318/376
• US Class Current: 180/65.285
• CPC Class Codes: B60K 1/02 comprising more than one electric motor
• CPC Class Codes: B60K 6/365 with the gears having orbital motion
• CPC Class Codes: B60K 6/445 Differential gearing distribution type
• CPC Class Codes: B60L 2240/421 Speed
• CPC Class Codes: B60L 2240/423 Torque
• CPC Class Codes: B60W 10/06 including control of combustion engines
• CPC Class Codes: B60W 10/08 including control of electric propulsion units, e.g. motors or generators
• CPC Class Codes: B60W 20/00 Control systems specially adapted for hybrid vehicles hybrid vehicle design, B60K6/00; electric vehicles B60L
• CPC Class Codes: B60W 2510/081 Speed
• CPC Class Codes: B60W 2510/244 Charge state
• CPC Class Codes: B60W 2520/10 Longitudinal speed
• CPC Class Codes: B60W 2540/10 Accelerator pedal position
• CPC Class Codes: B60W 2540/12 Brake pedal position
• CPC Class Codes: B60W 2710/0644 Engine speed
• CPC Class Codes: B60W 2710/0666 Engine torque
• CPC Class Codes: B60W 2710/081 Speed
• CPC Class Codes: B60W 2710/083 Torque
• CPC Class Codes: B60W 30/1884 Avoiding stall or overspeed of the engine
• CPC Class Codes: Y02T 10/62 Hybrid vehicles
• CPC Class Codes: Y02T 10/64 Electric machine technologies in electromobility

Abstract

An electrically powered vehicle includes: a boost converter that boosts a power supply voltage and outputs a boosted voltage; an inverter that receives the boosted voltage from the boost converter and controls a rotating electric machine for travel; and a control device that performs control to limit the boosted voltage when it is determined that the rotating electric machine is in a locked state and both an accelerator and a brake are not operated to be on.

Claims

1. An electrically powered vehicle comprising:

a boost converter that boosts a power supply voltage and outputs a boosted voltage;

an inverter that receives the boosted voltage from the boost converter and controls a rotating electric machine for travel; and

a control device that performs control to limit the boosted voltage when it is determined that the rotating electric machine is in a locked state and both an accelerator and a brake with a brake pedal are not operated to be on, and which does not perform control to limit the boosted voltage when it is determined that the rotating electric machine is in a locked state and both the accelerator and the brake with the brake pedal are operated to be on.

2. The electrically powered vehicle of claim 1, further comprising:

an internal combustion engine;

an additional rotating electric machine;

a power distribution mechanism that distributes power produced by the internal combustion engine to the additional rotating electric machine and wheels; and

an additional inverter that receives the boosted voltage from the boost converter and controls the additional rotating electric machine;

wherein the rotating electric machine applies driving force to the wheels.

3. A control device of an electrically powered vehicle including a boost converter that boosts a power supply voltage and outputs a boosted voltage and an inverter that receives the boosted voltage from the boost converter and controls a rotating electric machine for travel, the control device comprising:

an acquisition unit that acquires information indicating a rotating state of the rotating electric machine, information indicating an operating state of an accelerator, and information indicating an operating state of a brake pedal; and

a control unit that performs control, based on the information acquired by the acquisition unit, to limit the boosted voltage when it is determined that the rotating electric machine is in a locked state and both the accelerator and the brake with the brake pedal are not operated to be on, and which does not perform control to limit the boosted voltage when it is determined that the rotating electric machine is in a locked state and both the accelerator and the brake with the brake pedal are operated to be on.

4. The control device of an electrically powered vehicle of claim 3, further including an internal combustion engine, an additional rotating electric machine, a power distribution mechanism that distributes power of the internal combustion engine to the additional rotating electric machine and wheels, a boost converter that boosts a power supply voltage and outputs a boosted voltage, an additional inverter that receives the boosted voltage from the boost converter and controls the additional rotating electric machine, and wherein the rotating electric machine applies driving force to the wheels.

5. A computer readable medium storing a program causing a computer to execute a process for an electrically powered vehicle including a boost converter that boosts a power supply voltage and outputs a boosted voltage and an inverter that receives the boosted voltage from the boost converter and controls a rotating electric machine for travel, the process comprising:

acquiring information indicating a rotating state of the rotating electric machine, information indicating an operating state of an accelerator, and information indicating an operating state of a brake pedal; and

performing control, based on the information acquired by the acquisition unit, to limit the boosted voltage when it is determined that the rotating electric machine is in a locked state and both the accelerator and the brake with the brake pedal are not operated to be on, and which does not performing control to limit the boosted voltage when it is determined that the rotating electric machine is in a locked state and both the accelerator and the brake with the brake pedal are operated to be on.

6. The computer readable medium storing a program causing a computer to execute a process for an electrically powered vehicle of claim 5, further including an internal combustion engine, an additional rotating electric machine, a power distribution mechanism that distributes power of the internal combustion engine to the additional rotating electric machine and wheels, an additional inverter that receives the boosted voltage from the boost converter and controls the additional rotating electric machine, and wherein the rotating electric machine applies driving force to the wheels.