A rotary wing driving apparatus includes a motor, a rotary wing, and an electromagnetic brake. The rotary wing is attached to a shaft of the motor. The electromagnetic brake is attached to the shaft of the motor.

A rotary wing driving apparatus includes a motor, a rotary wing, and an electromagnetic brake. The rotary wing is attached to a shaft of the motor. The electromagnetic brake is attached to the shaft of the motor.

A control circuit, is disclosed, which is developed and intended for use in a motor vehicle. The control circuit comprises a first circuit portion, which is developed and intended to detect an error state of a control module and/or supply source, such as a voltage supply, of a drive arrangement, for example a drive arrangement of a brake system of the motor vehicle, and/or an electric drive of the drive arrangement, and is developed and intended to cause a short-circuit of the electric drive of the drive arrangement if an error state has been detected. A control method is also disclosed, for operating a brake system of a motor vehicle, as well as a computer program and a control unit or system having multiple control units.

A method and system for monitoring operation of a brake control circuit periodically verifies that redundant output control channels transition between ON and OFF states. A controller generates separate brake release signals for each of the redundant output control channels. The brake release signals are combined to form a brake command signal used to control operation of the brake coil. An input channel on the controller receives a signal corresponding to the current state of the brake command signal to monitor brake operation. The controller periodically modulates the brake release signals on each channel between an ON and an OFF state. The modulation is observed on the brake command signal to verify that each output channel is able to change state. The modulation occurs at a frequency greater than a response frequency of the brake coil such that the brake coil remains energized during modulation of each output channel.

A method and system for monitoring operation of a brake control circuit periodically verifies that redundant output control channels transition between ON and OFF states. A controller generates separate brake release signals for each of the redundant output control channels. The brake release signals are combined to form a brake command signal used to control operation of the brake coil. An input channel on the controller receives a signal corresponding to the current state of the brake command signal to monitor brake operation. The controller periodically modulates the brake release signals on each channel between an ON and an OFF state. The modulation is observed on the brake command signal to verify that each output channel is able to change state. The modulation occurs at a frequency greater than a response frequency of the brake coil such that the brake coil remains energized during modulation of each output channel.

A piece of electrical equipment for connecting both to at least one electromechanical braking actuator and also to at least one electromechanical drive actuator, the piece of electrical equipment (13a) comprising a housing (30), means for fastening the housing to the undercarriage, and inside the housing: a processor unit (32) arranged to generate a braking motor control signal and a drive motor control signal; a power supply unit (37) arranged to generate an equipment power supply voltage, a braking power supply voltage, and a drive power supply voltage; a power converter unit (40) arranged to generate a braking control voltage and a drive control voltage; and a distribution unit arranged to distribute the braking control voltage to the electromechanical braking actuator and the drive control voltage to the electromechanical drive actuator.

An electric-powered wheelbarrow in one aspect of the present disclosure includes a motor, a wheel, an electromagnetic brake, a control circuit, a signal-processing circuit, and a drive circuit. The electromagnetic brake includes an electromagnetic coil. The electromagnetic brake (i) applies a braking force to the wheel in response to the electromagnetic coil being de-energized and (ii) releases the braking force from the wheel in response to the electromagnetic coil being energized. The control circuit outputs a first control signal and a second control signal. The signal-processing circuit receives the first and second control signals to thereby output a deactivating signal. The drive circuit receives the deactivating signal and delivers an excitation current to the electromagnetic coil.

A drive system includes a frequency converter, a drive unit, and a power supply. The drive unit includes an electric motor and a further component, including a sensor element, actuator element, and/or data storage element. The frequency converter supplies the further component of the drive unit with energy via at least the power supply. The frequency converter is adapted to obtain a first piece of information about the maximum available electrical energy of the power supply and to obtain a second piece of information about the electrical energy requirement of the further component of the drive unit. The frequency converter is adapted to check the plausibility of the first piece of information with respect to the second piece of information. The decision-making criterion for the plausibility check is formed by a logical comparison of the first piece of information with the second piece of information. The frequency converter is configured to adapt the system state of the drive system in accordance with the result of the plausibility check.

An electric brake apparatus includes an electric motor including a plurality of driving circuits, an electric mechanism configured to press a braking member against a braking target member based on driving of the electric motor, and a control device configured to control the driving of the electric motor. The control device detects contact between the braking member and the braking target member based on a change in a current of the electric motor when power is supplied to a part of the driving circuits among the plurality of driving circuits. More specifically, the change amount of the current between before and after the braking member and the braking target member contact each other is larger when power is supplied to a part of the driving circuit than when power is supplied to all of the plurality of driving circuits.

A dual-voltage door operator control system comprises a contactor, a high-voltage connector, a low-voltage connector, a rectifier and a brake. When a door operator motor is electrically coupled to the low-voltage connector, the rectifier full-wave rectifies an external power source and then electrically energizes the brake. When the door operator motor is electrically coupled to the high-voltage connector, the rectifier half-wave rectifies the external power source and then electrically energizes the brake. Accordingly, the door operator motor can be connected to the high-voltage connector or the low-voltage connector according to the specification of the external power source provided at the site. Moreover, the invention is also further integrated with the brake of a single specification, and no matter whether the external power source is a high-voltage power source or a low-voltage power source, it can electrically energize the brake through the rectifier.