351results about "Multiple dc dynamo-electric motors control" patented technology

A method for estimating a service life of a motor that is driven by variable duty cycle control. The method includes calculating an elapsed service life ratio representing a ratio of an elapsed service life to all service life according to the following formula to estimate the service life of the motor:Ls=∑i⁢⁢(tiLi×(1.5)m)⁢⁢m=40-max⁡(40,Ki)10,where Ls represents the elapsed service life ratio, ti represents a driving time in a section i, Li represents a service life expectancy at a duty cycle Di in the section i and at an environmental temperature of the motor being 40° C., and Ki represents a temperature in the section i.

A system supplies electrical power to a remote electrical device. The system includes an AC / DC voltage converter coupled to the AC voltage source for converting an AC voltage from the AC voltage source to a high DC voltage output at a first location. The AC / DC voltage converter comprises a plurality of AC / DC voltage converter components which, on the input side thereof, are connected in parallel with the AC voltage source and which, on the output side thereof, are connected serially to an electric conductor. The electric conductor extends to a plurality of voltage converters at a remote location having inputs connected serially to the electrical conductor and having outputs providing an appropriate voltage to the electrical device, the plurality of voltage converters converting the high DC voltage to either a lower DC voltage or an alternating voyage without a cooling mechanism that would otherwise be needed when less than the plurality of voltage converters are implemented to convert the high DC voltage to the lower DC voltage or alternating voltage.

A drive apparatus for driving two motors by PWM control of respective switching elements connected to the motors, whereby respective control signals are applied to the switching elements such that each commencement of a transition of one of the switching elements from the non-conducting to the conducting state coincides with the termination of a transition of the other switching element from the conducting to the non-conducting state, thereby reducing generated electrical noise, and for supplying equivalent values of drive voltage to two motors of different power ratings which rotate respective cooling fans, to obtain equalized levels of air flow rate.

A motor control system includes a drive motor and a deck motor that are connected to a battery, an ECU, and a key switch. The key switch acquires that an operation unit has been turned on, and transmits a restart permission signal to the ECU. When SOC of the battery reaches or falls below a first threshold set in advance, the ECU performs a step of disabling all the motors, and when the restart permission signal is received, the ECU performs a step of executing a decelerated travelling mode where the disabled state of the drive motor is released and an allowed speed of the drive motor is reduced.

A novel multiple induction electric motor and vehicle that stores electrical power; provides a first and second direct current power input from the stored electrical power; separately produces first and second synchronized variable frequency alternating current control signal from the first and second direct current power inputs, respectively; produces first and second synchronized rotating magnetic fields responsive to the first and second variable frequency alternating current control signals, respectively; induces a first induced magnetic field around a conductor in a first inductive rotor responsive to the first rotating magnetic field; induces a second induced magnetic field around a conductor in a second inductive rotor responsive to the second rotating magnetic field; applies first and second rotational forces between the first and second rotating magnetic fields and the first and second induced magnetic fields to the shaft; and transmits the first and second rotational forces to a drive wheel.

A multi-port reconfigurable battery has at least one bank of statically joined series connected battery cells, each including a positive and negative pole connected through switches to respective output connections on at least one port. Processor controlled switches reconfigure the cells to provide power for electrical loads on one or more ports and simultaneously provide charging on one or more other ports. An alternative configuration divides groups of series connected cells into separate battery banks that permit other configurations. Ports are configurable to share one electrically common connection with other ports providing a simplified configuration (multi-tap reconfigurable battery). Applications include selectable motor speed control and battery regeneration schemes matched to motor output, and single or multiphase AC power output at selectable frequencies for use as an Uninterruptible Power Supply. The battery is also described as a power source for a forced-air induction system (e.g. electric supercharger) for a combustion engine.

A system and method is provided for improved monitoring and controlling of mechanically commutated DC motors. The system and method include DC motors, pulse-count driver circuitry for driving the motors, motor position sensing circuitry, and motor control circuitry. The system and method provide for improved motor current waveform sensing that is able to effectively reject false brake pulses, avoid erroneous processing due to fluctuating battery voltage levels, and reduce the sensitivity to variations in motor current signals due to dynamic motor load, manufacturing variation, system aging, temperature, brush bounce, EMI, and other factors. The system and method also include an improved ability to multiplex additional external motor drivers to the motor control circuitry, select between sequential and simultaneous drive modes using an SPI bit, and monitor the system controller for an error condition and simultaneously driver motors in response to the error condition.

A system and method for controlling multiple cooling fans is presented. The circuitry for directly driving each of the motors is removed from the motor casings, thus increasing air flow and reducing replacement costs should a motor fail. The system includes a common processor for centrally controlling the speeds of the motors and monitoring the performance of each of the multiple motors.

A system and method is provided for improved monitoring and controlling of mechanically commutated DC motors. The system and method include DC motors, pulse-count driver circuitry for driving the motors, motor position sensing circuitry, and motor control circuitry. The system and method provide for improved motor current waveform sensing that is able to effectively reject false brake pulses, avoid erroneous processing due to fluctuating battery voltage levels, and reduce the sensitivity to variations in motor current signals due to dynamic motor load, manufacturing variation, system aging, temperature, brush bounce, EMI, and other factors. The system and method also include an improved ability to multiplex additional external motor drivers to the motor control circuitry, select between sequential and simultaneous drive modes using an SPI bit, and monitor the system controller for an error condition and simultaneously driver motors in response to the error condition.

Each motor is controlled by a microcontroller and the set of microcontrollers is driven by a central controller. According to the invention, said method comprises: a preliminary step consisting at least in establishing an asynchronous serial communications link over a line between the central controller and each of the microcontrollers, and in allocating an address parameter to each microcontroller; and in operation, at least a control step proper consisting: i) for the central controller, in sending simultaneously on each link line a message containing at least one instruction specified by the address parameter of a destination microcontroller that is to execute said instruction; and ii) for each destination microcontroller, in extracting the instruction addressed thereto from said message, and executing it.

This invention relates to a fan regulation system with an error-tolerance ability including an input voltage testing circuit, a PWM circuit, a switch supply circuit and a fan set, in which, the control signal of rotation speed of the system and tested voltage signal control the output of the PWM waveforms, control the switch devices of a switch supply circuit and output a suitable voltage to the fan set, when the fan is tested to be faulty, the duty ratio of the PWm waveform can be adjusted.

A system and method is provided for improved monitoring and controlling of mechanically commutated DC motors. The system and method include DC motors, pulse-count driver circuitry for driving the motors, motor position sensing circuitry, and motor control circuitry. The system and method provide for improved motor current waveform sensing that is able to effectively reject false brake pulses, avoid erroneous processing due to fluctuating battery voltage levels, and reduce the sensitivity to variations in motor current signals due to dynamic motor load, manufacturing variation, system aging, temperature, brush bounce, EMI, and other factors. The system and method also include an improved ability to multiplex additional external motor drivers to the motor control circuitry, select between sequential and simultaneous drive modes using an SPI bit, and monitor the system controller for an error condition and drive the connected motors in response to the error condition.

The invention provides a multiple-motor control circuit with a link arm bridge, comprising a half-bridge switch mode drive circuit. The control circuit is characterized in that the half-bridge circuit 100 and the half-bridge circuit 130 among a half-bridge circuit 100, a half-bridge circuit 130 and a half-bridge circuit 150 are combined to control the rotation direction and revolving speed of any direct current (DC) motor 110 so as to form the multiple-motor control circuit with a link arm-bridge; when the multiple motors are required to be controlled for operation, arm bridges can be added to realize the purpose; and every time one arm bridge is added, at least one motor can be controlled additionally. The control circuit provided by the invention drives a plurality of DC motors, thus realizing that a simple control device is utilized to control the plurality of DC motors. The control circuit provided by the invention is used for controlling the plurality of DC motors, thus greatly reducing the construction cost and volume of a control system and improving the reliability of the system. The control circuit is suitable for controlling multiple DC motors.