Abstract: A motor-driven integrated circuit can include a bare die having an 8-bit microcontroller. The 8-bit microcontroller is fabricated by a 0.15 ?m semiconductor process.

Abstract: A motor-driven integrated circuit comprises a PWM output unit and an overcurrent comparator coupled with the PWM output unit. The overcurrent comparator receives a detection signal and compares the detection signal with a reference value. When the detection signal is larger than the reference value, the overcurrent comparator outputs an overcurrent protection signal to control the PWM output unit enter an overcurrent protection mode.

Abstract: An electronic circuit includes an output port, a first AC input port and a second AC input port connecting with an external AC power source, a rectifier circuit. The rectifier circuit includes a first input terminal coupled with the first AC input port, a second input terminal coupled with the second AC input port, a first output terminal and a second output terminal. A voltage of the first output terminal is larger than a voltage of the second output terminal. The electronic circuit further includes a first bidirectional electrostatic protection circuit coupled between the first AC input port and the second output terminal of the rectifier circuit; a second bidirectional electrostatic protection circuit coupled between the second AC input port and the second output terminal of the rectifier circuit; and a third bidirectional electrostatic protection circuit coupled between the output port and the second output terminal of the rectifier circuit.

Abstract: A motor-driven integrated circuit comprises a plurality of position comparators, a timer and a central processing. Each of the plurality of position comparators receives a pole detection signal denoted a position of a rotor of a motor. The timer receives a timing interrupt signal output by the plurality of position comparators when a predetermined edge of the pole detection signal is generated and records a time of the predetermined edge. The central processing unit obtains a rotation speed of the motor according to a time difference between two predetermined edges.

Abstract: Apparatus, having multiple motor modules, has an MCU module. Each motor module has an electronically controlled motor. The MCU module has an MCU and an interface for connecting to a bus from a CPU. In use the MCU module receives control signals from the CPU and in turn instructs a selected one of the motors to operate.

Abstract: Apparatus, having multiple motor modules, has an MCU module. Each motor module has an electronically controlled motor. The MCU module has an MCU and an interface for connecting to a bus from a CPU. In use the MCU module receives control signals from the CPU and in turn instructs a selected one of the motors to operate.

Abstract: A power conversion system includes an engine coupled to drive an alternator, a rectifier circuit, and an ignition controller. The alternator includes a stator and a rotor that cooperate when driven to provide a current supplied to the rectifier circuit. The rectifier circuit provides output power having a voltage. The ignition controller supplies energy to the spark plug of the engine. If the voltage exceeds a predetermined limit, the ignition controller supplies less energy to the spark plug to decrease engine drive. The stator may include several windings (or a tapped winding) and the system further includes an engine throttle controller and a winding control circuit. The winding control circuit selectively couples one or more windings of the plurality (or one or more turns of a tapped winding) to the rectifier circuit. The winding control circuit cooperates with a throttle controller to facilitate provision of a predetermined output power with a relatively low engine RPM for noise abatement.

Abstract: The throttle of an engine in an engine driven generator system operating under an intermittently heavy load, as in supplying current to a welder, is controlled such that successive control signals sent to a throttle actuator for adjusting the engine throttle position are inhibited until at least a predetermined time has elapsed since the last preceding adjustment to the throttle. This procedure ensures that, as to each incremental adjustment to the throttle, the engine has sufficient time to respond, thereby preventing over-speeding or stalling the engine. The throttle actuator may be a stepper motor which is stepped by throttle position change signals from a processor which monitors engine speed and generator load to determine whether the throttle should be adjusted and, if so, in which direct. Alternatively, the throttle actuator may be a solenoid pulling against a spring in accordance with the average current through the solenoid coil.

Abstract: The throttle of an engine in an engine driven generator system operating subject to a wide and rapidly variable load, as in supplying current to a welder, is operated such that control signals are sent to a throttle actuator for adjusting the engine throttle position in response to load changes. The throttle actuator may be a solenoid pulling against a spring in accordance with the average current through the solenoid coil. In this embodiment, the processor causes pulse width modulated signals to be applied across the solenoid coil with throttle position changes being reflected in changes to the width of the pulses, such changes in the pulse width being delayed for at least the predetermined time since the last preceding adjustment to the throttle.

Abstract: A particularly advantageous power converter, suitable for use in an engine powered generator system. A signal simulating a desired AC waveform is produced by a converter circuit at first and second converter output terminals. The converter circuit, responsive to respective switching signals applied thereto, selectively effects current paths between a juncture node and one of the first and second converter output terminals and between a common rail and the other of the first and second converter output terminals. A controller selectively generates control signals to the converter circuit and to a mechanism for varying the magnitude of the juncture node voltage, to create a predetermined waveform at the converter output terminals simulating the desired AC waveform. A number of alternative embodiments for producing a simulated sine wave are described, as well as accommodations for inductive loads, and mechanisms for minimizing power dissipation during the switching interval.

Abstract: An improved method and system of increasing the effective electrical load capacity of a power converter is disclosed. Potential damage due to current surges from variation in load is avoided by sensing an impending over-current condition, decreasing the system output by a predetermined amount or to a predetermined level, and then gradually increasing the output to bring the system back to desired operating conditions. Such control can be affected by varying the throttle setting to adjust rotor speed, controlling the DC rail level, or a combination of both methods.

Abstract: A particularly advantageous power converter, suitable for use in an engine powered generator system. A signal simulating a desired AC waveform is produced by a converter circuit at first and second converter output terminals. The converter circuit, responsive to respective switching signals applied thereto, selectively effects current paths between a juncture node and one of the first and second converter output terminals and between a common rail and the other of the first and second converter output terminals. A controller selectively generates control signals to the converter circuit and to a mechanism for varying the magnitude of the juncture node voltage, to create a predetermined waveform at the converter output terminals simulating the desired AC waveform. A number of alternative embodiments for producing a simulated sine wave are described, as well as accommodations for inductive loads, and mechanisms for minimizing power dissipation during the switching interval.