摘要:
A motor-based position system includes one or more motors having a rotor. The system further includes a motor controller. The motor controller is communicatively coupled to each of the motors. The system further includes one or more encoders configured to detect an absolute position of each motor and one or more devices configured to collect inertial data. The system further includes a processing device coupled to the motor controller, one or more encoders and one or more devices. The processing device is configured to receive signals indicative of motors' absolute position from the encoders and configured to convert the received encoder signals into a format understood by the motor controller. The processing device is further configured to send the converted signals to the motor controller with low latency and configured to combine the received encoder signals with the inertial data to generate more accurate positional information.
摘要:
A motor driving apparatus includes a boosting section, a drive voltage output section, a detecting section, a storage section and a determining section. The boosting section generates a post-boosting voltage by boosting an input voltage. The drive voltage output section generates a drive voltage to drive a motor using the post-boosting voltage. The detecting section detects a value of the input voltage or a variation width relative to a reference value of the input voltage as variation power source variation information when there is power source variation. The storage section stores target value association information associating the power source variation information and a boosting target value of the post-boosting voltage. The determining section determines the boosting target value based on the power source variation information and target value association information. The target value association information is determined based on a range of operations of the drive voltage output section.
摘要:
In an EC motor, comprising a motor electronics, a signal input or a signal output, and an optocoupler for the galvanically isolated transmission of a useful signal between the motor control unit and the signal input or the signal output, the intention is to reliably determine the degradation of the optocoupler and to improve the service life of the EC motor. This is achieved in that an evaluation unit regularly evaluates a saturation voltage of the optocoupler at the output of the optocoupler in relation to a reference threshold when the optocoupler is wired and generates a warning signal when the saturation voltage exceeds the reference threshold.
摘要:
A motor drive system control apparatus includes: a direct current power supply; a three-phase alternating current motor; a first power converter including switching circuits corresponding to each of three phases of the three-phase alternating current motor and a smoothing condenser disposed electrically in parallel with the switching circuits; an estimating device for estimating peak generation timing in which a peak is generated in an inter-terminal voltage VH of the smoothing condenser on the basis of at least one of an operating condition of the three-phase alternating current motor; a switching condition of the switching circuits corresponding to each of the three phases; and a controlling device for controlling a drive condition of the first power converter so the inter-terminal voltage VH (or a VH peak) in the peak generation timing decreases, for a predetermined period from start timing set in a time domain before the estimated peak generation timing.
摘要:
A hybrid-electric vehicle and method of controlling a hybrid-vehicle is provided. The vehicle includes a traction battery, at least one electric-machine, and a controller. The controller is configured to alter a voltage between the battery and the electric-machine based on a measured voltage of the battery or the high voltage bus. In response to an indication that the measured voltage is faulty during a drive cycle, the controller instead alters the voltage between the battery and the electric machine based on a substituted battery voltage signal such that the electric-machine remains operable for the drive cycle.
摘要:
In one aspect of the teachings herein, an interface circuit obviates the need for a microcontroller with multi-channel PWM capability in the context of controlling a brushless, three-phase DC motor. Instead, the interface circuit generates the requisite set of motor-phase control signals using a single PWM channel from the microcontroller. The interface circuit is implemented as a standalone integrated circuit (IC) in one embodiment, and is integrated into a pre-driver circuit in another embodiment.
摘要:
Disclosed is a system and method of controlling an inverter to reduce noise in an eco-friendly vehicle. In the method, at least one of a current motor torque and a current motor speed is monitored in real-time. It is determined whether or not the at least one of the current motor torque and the current motor speed corresponds to a noise occurrence range set to a current switching frequency. A changed switching frequency value corresponding to the at least one of the current motor torque and the current motor speed is calculated when the at least one of the current motor torque and the current motor speed corresponds to the noise occurrence range. A PWM signal is generated using the changed switching frequency value to control an inverter.
摘要:
A controller for a conventional synchronous motor is configured to produce desired output characteristics. The controller generates a drive current for based on a current command, has a motor correcting section and a gain adjusting section which output a compensated current command based on the current command according to a compensating transfer function for cancelling a first transfer function showing a first torque response characteristic of the synchronous motor and replacing it with a second transfer function showing a second torque response characteristic, and a current controller which generates a drive current corresponding to the compensated current command.
摘要:
In an EC motor, comprising a motor electronics, a signal input or a signal output, and an optocoupler for the galvanically isolated transmission of a useful signal between the motor control unit and the signal input or the signal output, the intention is to reliably determine the degradation of the optocoupler and to improve the service life of the EC motor. This is achieved in that an evaluation unit regularly evaluates a saturation voltage of the optocoupler at the output of the optocoupler in relation to a reference threshold when the optocoupler is wired and generates a warning signal when the saturation voltage exceeds the reference threshold.
摘要:
A method and apparatus for controlling a brushless direct current motor. An H-bridge is configured to couple a direct current power source to windings of the brushless direct current motor. The H-bridge comprises a plurality of switches. A motor controller is configured to close one of the plurality of switches to put the H-bridge in a coast configuration, wherein the windings of the motor are short circuited. A desired direction for a current impulse to the windings is identified. The one of the plurality of switches is opened in response to identifying a first desired direction for the current impulse to provide the current impulse in the first desired direction to the windings. Another of the plurality of switches is closed in response to identifying a second desired direction for the current impulse to provide the current impulse in the second desired direction to the windings.