12results about "Dc motor starters" patented technology

A startup control circuit includes a direct current (DC) conversion circuit, a main control unit, a first switch circuit and a second switch circuit. The first switch circuit is connected to the battery pack and the DC conversion circuit. The second switch circuit is connected to a battery pack, the DC conversion circuit, and a main control unit. The first switch circuit is configured to activate the DC conversion circuit to supply power to the second switch circuit and the main control unit after the first switch circuit is triggered. The second switch circuit outputs different voltage waveforms based on different timing sequences of currents flowing from the battery pack and the DC conversion circuit to the second switch circuit. The main control unit is configured to output a first drive command when receiving a first voltage waveform.

This document relates to a method and an electronic device including a flexible display. According to an embodiment, the electronic device can include a plurality of batteries, a flexible display, a motor for driving at least a portion of the flexible display to move, a motor driving circuit connected to the motor, a switching circuit including a plurality of switches for switching between a first state in which the plurality of batteries are connected in series and a second state in which the plurality of batteries are connected in parallel, a memory for storing instructions, and a processor. According to an embodiment, the instructions, when executed by the processor, can cause the electronic device to identify an event for switching an electrical connection state of the plurality of batteries, and based on the identified event, control the switching circuit to switch the electrical connection state from the first state to the second state or from the second state to the first state. Other embodiments are possible.

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.

The application discloses a frequency selective amplitude limiter and a radio frequency device, and relates to the technical field of microwave radio frequency devices. Specifically, the frequency selective amplitude limiter comprises a planar transmission line structure, a first magnetic film and a second magnetic film. The planar transmission line structure is used for transmitting a microwave radio frequency signal and generating a microwave magnetic field. The first magnetic film covers a first surface of the planar transmission line structure. The second magnetic film covers a second surface of the planar transmission line structure, so that the planar transmission line structure is clamped between the first magnetic film and the second magnetic film. The microwave magnetic field generated by the planar transmission line structure is coupled to the first magnetic film and the second magnetic film at the same time. The first surface and the second surface of the planar transmission line structure are covered by the first magnetic film and the second magnetic film respectively, so that the magnetic coupling efficiency can be improved without greatly increasing the interaction length, and the frequency selective amplitude limiter also has a very low nonlinear starting threshold and a very low insertion loss.

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.

The application provides a motor identification method based on a battery management module, a motor identification system and a dust collector. The motor identification method based on the battery management module comprises but is not limited to the following steps: in the starting process of the motor, the battery management module controls the opening of a MOS tube, wherein the MOS tube controls the on-off of the starting current of the motor; when the MOS tube is opened and before the motor starts to rotate, an analog-to-digital converter built in the battery management module is used to collect the starting current flowing through the MOS tube; the battery management module collects the power supply voltage of the motor; according to the collected starting current and power supply voltage, the characteristic constant of the motor is determined; and according to the characteristic constant, the model of the motor is determined.

This utility model discloses a series resistance starting device for a DC oil pump, including a power supply device, a control device, a resistor device, a cut-off device, and a heat dissipation device. The series resistance starting device provided by this utility model can meet the combination and switching of various resistor specifications. One device can meet the starting and testing of multiple DC oil pumps with different power, solving the problem that various resistor starting devices of different specifications are required to test oil pump motors with different power, and further reducing the time cost and equipment cost of testing.

This application belongs to the field of intelligent control and mechatronics technology, specifically a DC motor control system, a window opening system, and a control method. Specifically, the DC motor control system includes a main controller, sub-control units, and a two-wire transmission unit. The main controller superimposes a polarity switching control signal onto the power supply current, and the sub-control units parse this signal or respond to local commands to drive the motor in forward and reverse rotation. The system provided in this application uses only two wires (A / B) for power supply and communication, and is suitable for window opening scenarios with both centralized control and local manual dual-mode operation, as well as other DC motor control scenarios with similar application needs.

This invention relates to a method, system, and cleaning equipment incorporating a motor slow-start control. The method includes: acquiring the target operating voltage of the motor in the cleaning equipment when it is started; adjusting the duty cycle of the motor's PWM signal; and controlling the motor to slowly operate to the target operating voltage according to the adjusted PWM signal duty cycle, thus completing the slow start of the motor. This invention enables the motor to start slowly by acquiring the target operating voltage of the motor at startup, i.e., the operating voltage during the stable operation phase of the motor; and by adjusting the duty cycle of the motor's PWM signal to slowly adjust the motor's operating voltage to this stable operating voltage. This allows the cleaning operation of the cleaning equipment to begin gradually, rather than operating directly at the normal cleaning speed, preventing the user from feeling suddenly pulled forward and effectively improving the user experience.

This invention discloses an electric drive device and an electric sunroof, electric seats, and a vehicle incorporating it. The electric drive device includes: a differential, a first output shaft, a second output shaft, a locking mechanism, a motor, and a switching mechanism. The first and second output shafts are respectively poweredly connected to the differential. The switching mechanism controls the locking mechanism to switch between a first locking state and a second locking state, allowing the motor to output power through either the first or second output shaft. According to the electric drive device of this invention, the switching mechanism controls the locking state of the locking mechanism, enabling the motor to drive either the first or second output shaft through the differential for power output. This allows for independent output from a single motor on two shafts, reducing the number of motors needed when multiple actuators need to be driven. This, in turn, helps reduce the cost, weight, and space occupied by the electric drive device, and improves the layout flexibility of the electric drive device.

A self-powered motor braking mechanism includes a dedicated power source sized for braking the respective motor and a dedicated braking circuitry configured to provide hybrid braking of the motor to a targeted stop. The motor braking circuitry is configured, in the event of a loss of primary power driving the motor, to provide a combination of two or more of dynamic braking, active braking and active position control to achieve zero speed of the motor by a target stopping time.