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System and method for controlling a brake motor

a technology of brake motor and system, applied in the field of brake systems, can solve the problems of brake system failure, vehicle cannot function as designed, brake system must remain unengaged,

Inactive Publication Date: 2005-03-03
DELPHI TECH INC +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The invention is a method and system for controlling a brake motor by receiving motor information, determining voltage and current values, and calculating resistance and temperature values. A control signal is then produced based on the temperature value. The technical effect of this invention is to provide a more efficient and effective way to control brake motors, ensuring safe and reliable operation.

Problems solved by technology

Additionally, brake systems must remain unengaged when not required.
The vehicle will not be able to function as designed if brake systems, or portions of brake systems, function improperly.
One cause of brake system failure is excessive heat.
In electric or electro-mechanical brake systems, temperature sensing is a critical issue to protect the motor and electronics of the electric caliper.
Unfortunately, the circuit board is not the only critical thermal element within electric or electro-mechanical brake systems.

Method used

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  • System and method for controlling a brake motor
  • System and method for controlling a brake motor
  • System and method for controlling a brake motor

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Embodiment Construction

[0015]FIG. 1 is a block diagram illustrating a brake motor control system 100. FIG. 1 details an embodiment of a system for controlling a brake motor 110 within a brake system in accordance with the present invention. Brake motor control system 100 includes brake motor 110 and brake motor controller 120. Brake motor 110 includes motor shaft 115 coupled to brake motor 110. Brake motor controller 120 includes voltage sensor 130, current sensor 140, processor 150, and power motor driver 160. Brake motor control system 100 may include additional components not relevant to the present discussion.

[0016] In one embodiment and illustrated in FIG. 1, brake motor 110 is implemented as a three-phase direct current (DC) motor, which is a commonly known and utilized technology in the motor industry. In other embodiments, brake motor 110 is implemented as a direct current (DC) brush-type motor or multi-phase motors, such as, for example a 4-phase switched reluctance motor. In FIG. 1, brake motor...

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Abstract

The present invention includes a method for controlling brake motor. The method includes receiving brake motor information, determining a first brake motor voltage value and a brake motor current value based on the motor information when the brake motor is active, determining a brake motor resistance value based on the first brake motor voltage value and the brake motor current value, determining a brake motor temperature value based on the determined brake motor resistance value, and producing a brake motor control signal based on the determined brake motor temperature value. The method may additionally include determining a second brake motor voltage value when the brake motor is inactive, and producing a motor diagnostic voltage value based on the determined second brake motor voltage value.

Description

FIELD OF THE INVENTION [0001] The technical field of this disclosure is brake systems, and more particularly, electric brake systems and electric brake systems within hybrid brake systems. BACKGROUND OF THE INVENTION [0002] Control of brake systems is an important aspect of automotive functionality. Brake systems must engage when required, such as, for example during application of caliper pressure to slow or stop a vehicle. Additionally, brake systems must remain unengaged when not required. The vehicle will not be able to function as designed if brake systems, or portions of brake systems, function improperly. One cause of brake system failure is excessive heat. [0003] Recently, hybrid brake systems have become increasingly utilized in the automotive industry. Hybrid systems typically utilize a hydraulic brake system for one axel (i.e. the front axel) and an electric or electro-mechanical brake system for the other axel. Additionally, electric or electro-mechanical only brake syst...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): B60T13/74
CPCB60T13/741
Inventor DISSER, ROBERT J.
Owner DELPHI TECH INC