A control circuit and method for DC motors is disclosed in the present application. The control circuit may comprise a voltage monitoring unit for monitoring the output voltage of the DC power supply, a switching circuit for controlling the operation of the DC motor, and a PWM signal output unit to output PWM signal for controlling the switching circuit. The PWM signal output unit may be configured to regulate the duty cycle of the output PWM signal based on the results of the voltage monitoring unit. In this way, motors with different resistances may work continuously in a stabilized state. Also, it may detect when a load like motor is heavy loaded or overloaded, stop motor from starting, and avoid overtime working due to the drop of supply voltage damaging the load like motor. When the voltage of power supply is higher than the rated voltage of the motor, it may regulate the input voltage value of power supply to avoid the increase of excitation current of motor with the increase of the applied voltage, thereby avoid the loss of iron core.

A control circuit and method for DC motors is disclosed in the present application. The control circuit may comprise a voltage monitoring unit for monitoring the output voltage of the DC power supply, a switching circuit for controlling the operation of the DC motor, and a PWM signal output unit to output PWM signal for controlling the switching circuit. The PWM signal output unit may be configured to regulate the duty cycle of the output PWM signal based on the results of the voltage monitoring unit. In this way, motors with different resistances may work continuously in a stabilized state. Also, it may detect when a load like motor is heavy loaded or overloaded, stop motor from starting, and avoid overtime working due to the drop of supply voltage damaging the load like motor. When the voltage of power supply is higher than the rated voltage of the motor, it may regulate the input voltage value of power supply to avoid the increase of excitation current of motor with the increase of the applied voltage, thereby avoid the loss of iron core.

Implemented are: a first energization step of energizing a motor during a first period in any first excitation pattern at a start of the motor; and a second energization step of energizing the motor, after the first energization step, during a second period longer than the first period in a second excitation pattern advanced from the first excitation pattern by a predetermined angle, for example, 120, in a rotation instruction direction. After the second energization step, forced commutation is started so that the motor rotates from a rotational position corresponding to the second excitation pattern.

Implemented are: a first energization step of energizing a motor during a first period in any first excitation pattern at a start of the motor; and a second energization step of energizing the motor, after the first energization step, during a second period longer than the first period in a second excitation pattern advanced from the first excitation pattern by a predetermined angle, for example, 120, in a rotation instruction direction. After the second energization step, forced commutation is started so that the motor rotates from a rotational position corresponding to the second excitation pattern.

A method for operating a universal motor, comprising the following steps: establishing a synthetic variable from at least two physical operating parameters of the universal motor; and operating the universal motor using operating parameters of this type so that the synthetic variable remains at a substantially constant level or at least does not exceed a defined permissible upper limit.

A method for operating a universal motor, comprising the following steps: establishing a synthetic variable from at least two physical operating parameters of the universal motor; and operating the universal motor using operating parameters of this type so that the synthetic variable remains at a substantially constant level or at least does not exceed a defined permissible upper limit.

When a power failure does not occur, power supply to a first terminal of a wiper motor is performed by a first battery, and power supply to a second terminal of the wiper motor is performed by a second battery. When a power failure occurs in one of the first battery or the second battery, power supply to the wiper motor is performed by the other battery that is not in power failure.

When a power failure does not occur, power supply to a first terminal of a wiper motor is performed by a first battery, and power supply to a second terminal of the wiper motor is performed by a second battery. When a power failure occurs in one of the first battery or the second battery, power supply to the wiper motor is performed by the other battery that is not in power failure.

A device for the regulation of devices which can be regulated with a 0-10 Vdc and/or PWM command is herein disclosed, the device having at least one power supply input, at least one regulation input adapted to receive external regulation signals, a potentiometer comprising a selector element, the potentiometer being configured to provide a manual voltage regulation, and at least one command output configured to output a command signal towards the devices to be regulated. The device further comprises a switching element configured to cause a switching of said device between a first regulation mode, in which the command signal is generated by said device and is manually adjustable through the selector element of said potentiometer, and a second regulation mode, which allows a regulation of the devices to be regulated via the command signal from the command output based on an external device connectable to the regulation input. A system comprising the above device is also disclosed.

A device for the regulation of devices which can be regulated with a 0-10 Vdc and/or PWM command is herein disclosed, the device having at least one power supply input, at least one regulation input adapted to receive external regulation signals, a potentiometer comprising a selector element, the potentiometer being configured to provide a manual voltage regulation, and at least one command output configured to output a command signal towards the devices to be regulated. The device further comprises a switching element configured to cause a switching of said device between a first regulation mode, in which the command signal is generated by said device and is manually adjustable through the selector element of said potentiometer, and a second regulation mode, which allows a regulation of the devices to be regulated via the command signal from the command output based on an external device connectable to the regulation input. A system comprising the above device is also disclosed.