US 2017/0349153 A1Published application

Motor drive control unit

AssigneesDenso Corporation, Advics Co., Ltd.

InventorsHironobu YAMASHITA, Takahiro YAMAGUCHI, Kennji FUJIWARA, Takashi MURAYAMA, Keita NAKANO, Aritomo NABETA

Life of this patent

Estimating the term…

Loading patent…

Abstract

An increase in startup current supplied to a motor is suppressed at an initial stage of starting automatic braking control, while current supply to the motor is performed in a fully energized state after the automatic braking control is started. While output of the motor is increased by controlling the motor in the fully energized state so that a high braking force with high responsiveness is obtained, startup current is prevented from becoming excessive by performing high frequency control only at startup. Thus, decrease in battery voltage is minimized and thus the occurrence of malfunction is minimized in the control systems of various electrical components used in the vehicle.

Claims6

Dependent claims

A motor drive control unit that controls driving of a motor provided in a vehicle braking device to drive a pump arranged in a hydraulic circuit of the vehicle braking device, the vehicle braking device applying automatic braking by charging and discharging a brake fluid to generate a wheel cylinder pressure in a wheel cylinder, the motor drive control unit comprising:

a switching element provided in a supply path through which a motor current is passed from a power source to the motor to control on/off switching of the supply path;
and
control means performing motor control in which current supply to the motor is controlled by controlling on/off switching of the switching element,
the control means including:
startup control means performing high frequency control with respect to the switching element at startup when current supply to the motor is started to apply automatic braking;
and
normal control means continuously turning on the switching element after the high frequency control is performed at the startup, and achieving a fully energized state in which current supply to the motor is continuously performed.

4 more elements

Dependencies are inferred from the claim text.