摘要:
A maneuvering drive (24, 30) for a trailer (10) has a central unit (30), at least two drive units (24) by which wheels (16) of the trailer (10) can be driven and which are controlled by the central unit (30), each drive unit (24) including a checking module (40) by which drive specifications of the central unit (30) can be checked as to whether they can be fulfilled, and a feedback channel being provided by which the drive units (24) can feed back to the central unit (30) if the drive specifications cannot be fulfilled.
摘要:
To enable control the number of revolutions of a wheel with a new structure different from an induction motor and adjust the maximum torque rapidly and accurately.A linear drive travel system includes a metal wheel 20 having a drum rotor and a stator 30 arranged inside the metal wheel 20. The stator 30 includes a plurality of rows of electromagnets 32 arranged in the direction of rotation axis, each row being formed of a plurality of electromagnets 32 arranged along the circumference around a rotary shaft 40. A drum rotor includes a plurality of arc-shaped rotor cores 23 arranged along the circumference around the rotary shaft 40. Control means (control system 80) performs control by allowing electromagnets 32 in some rows to be a magnetization coil of the rotor core and by allowing the electromagnets 32 in other rows to be a rotation coil of the drum motor.
摘要:
When an ECU receives a transmission signal having a high level from a transmission, the ECU exerts torque reduction control to reduce a torque control value for a motor generator. Furthermore the ECU sets an optimum (or target) value of a voltage as based on the torque control value and a motor rotation speed and controls an upconverter. Herein, when the transmission is shifting gears, the ECU controls the upconverter to allow the voltage to be constant regardless of whether the torque reduction control is exerted to reduce the torque control value.
摘要:
A wheel provided with an electro motor in the wheel. A wheel strut is attached to a vehicle, and a wheel is attached to the wheel strut. The electro motor causes a wheel attachment component to rotate about its longitudinal axis. Data from the wheel is exchanged with other similar wheels.
摘要:
Available torque output from a battery-powered traction motor system in a vehicle is estimated, wherein the system includes a high-voltage battery coupled to a traction motor by an inverter, wherein the inverter is controlled in response to a torque/speed command within an inverter controller, and wherein the system further includes a DC-to-DC converter coupled to the high-voltage battery to provide a reduced voltage to charge a low-voltage battery. Battery operating conditions of the high-voltage battery are determined including available battery power and battery voltage. Traction motor operating conditions including a flux linkage and other electrical parameters are determined. The battery information including voltage, current, and internal resistance is transformed into synchronous coordinates. An available quadrature current corresponding to the maximum available torque is determined in response to the traction motor operating conditions and the battery voltage in the synchronous coordinates. The available quadrature current is clamped in response to predetermined clamping limits. A first estimated available torque is determined in response to the clamped available quadrature current and the traction motor operating conditions. A high-voltage power usage is determined including power consumed in the DC-to-DC converter, power loss in the DC-to-DC converter, and power loss in the traction motor and inverter. An angular speed of the traction motor is measured. A second estimated available torque is determined in response to the available battery power, the high-voltage power usage, and the angular speed. A lesser one of said first and second estimated available torques is selected as the available torque output from the battery-powered traction motor system.
摘要:
A motor control device has a flux-weakening angle setting section that variably sets an angle of flux-weakening whereby correction is effected by a current instruction value in accordance with a torque instruction when flux-weakening control is performed to correct the current instruction value such that the terminal voltage of a permanent magnet reluctance motor that generates a combined torque of torque produced by a permanent magnet and reluctance torque does not exceed the maximum voltage of the inverter output. This flux-weakening angle setting section sets the flux-weakening angle in a direction in which the torque is practically invariant.
摘要:
A motor controller drives a motor based on signals from commutation sensors (CS signals.) This controller includes (a) a pole position detector for detecting a rotor pole position with edges of the CS signals; (b) a speed detector for detecting a motor speed based on a time interval between the edges of the CS signals; (c) a pole phase detector for estimating a position angle of the rotor based on an output from the position detector and an output from the speed detector; and (d) a phase limiter for restraining the estimated position angle from advancing over a given value. When the limiter continues operating for a certain interval, the controller switches the motor from sine wave driving to rectangular wave driving. This structure allows this controller to drive the motor stably when the motor speed is abruptly changed in the sine wave driving or under field weakening control.
摘要:
A method of increasing the power output of existing permanent magnet motors along with apparatus is disclosed. Increased power output is achieved by more completely utilizing the magnetic field of motor permanent magnets during running. The apparatus is external to the motor and therefore eliminates the need for modifications to the motor itself. The method involves providing a source of power to a permanent magnet motor which is capable of demagnetizing the motor permanent magnets at stall, and reducing the power at start up to a level sufficient to prevent demagnetization. Full power to the motor is provided when the motor speed reaches a level sufficient to prevent demagnetization of the permanent magnets.
摘要:
A control system and method for use in controlling a torque-controlled permanent magnet synchronous motor drive. A slew-rate limiter processes an input torque command to produce a modified torque command that is input to the motor drive. A controller is coupled to the slew-rate limiter and the motor drive for dynamically limiting the input torque command applied to the motor drive and its rate of increase. The slew rate limiter processes an applied torque command to output a modified torque command that is applied to the motor drive. Current control error signals are output by the motor drive. The RMS value of the current control error signals is computed. The RMS value is compared to low and high thresholds. If the RMS value is greater than the high threshold, the modified torque command is reduced until the RMS value is less than the high threshold. If the current control error signal is greater than the low threshold and less than the high threshold, the modified torque command is not increased in absolute value even if the input torque command is increasing in absolute value. If the RMS value is less than the low threshold, no change is made to the input torque command.
摘要:
A circuit and method for controlling a rotating machine (11) in the constant horsepower range above base speed uses an inverter (15) having SCR's (T1-T6) connected in series with the primary commutation switches (Q1-Q6) to control turn off of the primary commutation switches and to protect the primary commutation switches from faults. The primary commutation switches (Q1-Q6) are controlled by a controller (14), to fire in advance or after a time when the back emf equals the applied voltage, and then to turn off after a precise dwell time, such that suitable power is developed at speeds up to at least six times base speed.