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DC brushless motor hall sensor redundancy design

A brushless DC motor, Hall sensor technology, applied in the direction of motor control, electronic commutator, electrical components, etc., can solve the problem that is not easy to judge whether there is a fault and the specific Hall of the fault, excessive thermal load of the motor, phase current Too large and other problems, to achieve the effect of being beneficial to motor control and improving work efficiency

Inactive Publication Date: 2017-05-10
TIANJIN SANTROLL ELECTRIC AUTOMOBILE TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Accurate rotor phase is very important for the control strategy of brushless DC motor. The accuracy of the phase directly affects the vibration, noise and efficiency of the motor during operation. However, if the Hall sensor fails, the motor controller will analyze the wrong rotor. Phase signal and output wrong control signal, which will bring serious consequences, such as torque fluctuation, excessive phase current, excessive thermal load of the motor and even internal short circuit of the motor
[0004] Existing DC brushless motors are generally equipped with three symmetrically installed Hall sensors. The encoding signals of the three-phase Hall sensors are 001, 010, 011, 100, 101, and 110. A total of six signals can be used. Divide an electrical cycle of the DC brushless motor into six areas, and there are six accurate reference phases at the junction of the areas. However, when one or two phases of the three-phase Hall fail, its output is still the above six A coded signal, it is not easy to judge whether there is a fault and the specific Hall of the fault, which is not conducive to the efficient control of the motor

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  • DC brushless motor hall sensor redundancy design
  • DC brushless motor hall sensor redundancy design
  • DC brushless motor hall sensor redundancy design

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Embodiment approach

[0031] Such as figure 1 Shown is a schematic structural diagram of the first embodiment of the redundant design of the DC brushless motor Hall sensor of the present invention. The motor is arranged with two sets of three-phase Hall sensors, respectively Hall A1, Hall B1, Hall C1 and Hall Hall A2, Hall B2, and Hall C2, the Hall A1, Hall B1, and Hall C1 are symmetrically arranged outside the motor rotor, and the Hall A1, Hall B1, and Hall C1 are arranged between adjacent Halls The included angle is 120°, the Hall A2 is set at the same position as the Hall A1, the Hall B2 is set at the same position as the Hall B1, the Hall C2 is set at the same position as the Hall C1 set at the same location.

[0032] The Hall A1, Hall B1, Hall C1, Hall A2, Hall B2, and Hall C2 can respectively determine the two positions of the motor rotor according to the output level of the magnetic flux, respectively corresponding to the dotted lines in the figure. Position, that is, the Hall A1, Hall B1,...

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Abstract

The invention discloses a DC brushless motor hall sensor redundancy design. The design comprises two three-phase Hall sensors, the three-phase Hall sensors are symmetrically arranged and are positioned independently, when one Hall senor generates a fault, an another Hall sensor can replace the failed Hall sensor rapidly, the position of the failed Hall sensor can be rapidly detected, effective fault processing measures can be taken, in case of multiphase Hall faults, normal work can still be carried out, motor control is facilitated, and the work efficiency of a motor is improved.

Description

technical field [0001] The invention relates to the control of a DC brushless motor, in particular to a method for controlling a Hall sensor of a DC brushless motor. Background technique [0002] Brushless DC motors have the advantages of high torque, high energy density, high efficiency, and low noise, and are widely used in drive motors for new energy vehicles. The vector control method of DC brushless motors needs to accurately determine the rotor position. The advantages of small size, convenient installation, and low price are widely used in the phase detection of brushless DC motor rotors. [0003] Accurate rotor phase is very important for the control strategy of brushless DC motor. The accuracy of the phase directly affects the vibration, noise and efficiency of the motor during operation. However, if the Hall sensor fails, the motor controller will analyze the wrong rotor. Phase signal and output wrong control signal, which will bring serious consequences, such as ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K29/00H02P6/16H02P29/028
CPCH02K29/00H02P6/16
Inventor 李岷舣余国权刘菁黄俊
Owner TIANJIN SANTROLL ELECTRIC AUTOMOBILE TECH CO LTD