Abstract: The present invention relates to a self-propelled material processing and/or handling system for processing and/or handling construction and/or raw materials, in particular in the form of a mobile crushing system, with at least one working unit, which is drivable, by an electric unit drive, with an electric motor, at least one electric travel drive with an electric motor, as well as a control device to control the electric motors of the unit and travel drives. According to the invention, the control device comprises a common frequency converter for the at least one travel drive and the at least one unit drive and provides various parameter sets for the common frequency converter so that the travel drive is actuatable by the frequency converter on the basis of a first parameter set and the unit drive is actuatable by the common frequency converter on the basis of a second parameter set.

Abstract: An alternator assembly includes an input terminal configured to input an alternating voltage, an output terminal configured to output a rectified voltage, and a gated diode arranged in a load path between the input terminal and the output terminal.

Abstract: A power generation system includes a generator operatively coupled to an engine for generating electrical power and supplying the electrical power to a grid. Further, the power generation system includes a resistive braking system operatively coupled between the generator and the grid. The resistive braking system includes a mechanical switch connected in parallel with a resistor, and a controller for, in response to a grid event, controlling power from the engine and operating the mechanical switch to redirect current between the mechanical switch and the parallel connected resistor.

Abstract: To provide a motor control circuit that variably controls the speed of a motor, in which an appropriate control gain corresponding to the speed of the motor that is set can be automatically set. The motor control circuit includes a period error signal output means, a speed error signal output means and a gain correction means.

Abstract: The present invention relates to a self-propelled working machine, especially in the form of a surface milling machine, such as asphalt-milling machine or snow-milling machine comprising a main operating unit and/or a drive unit, which is operable in a steady-state or near steady-state operating status and is drivable by a drive device comprising at least an electrical motor, the electrical motor being associated with a start-up including a frequency converter for the limitation of starting current. The invention also relates to a process for operating such a self-propelled working machine. According to the invention an operating circuit for steady-state operation is provided, comprising a jumper for bridging the frequency converter following starting or reaching steady-state operational status. Optionally, the jumper is switchable to activate or inactivate the frequency converter of the start-up circuit, respectively.

Abstract: A traction motor system calculates motor flux by generating a real time effective resistance of a resistance grid calculated from motor torque and measured voltage on a DC link. Calculating effective resistance avoids solely relying on DC link voltage, which can be influenced by conditions such as wheel slip and drop out of one or more resistance grids. The effective resistance calculation is based on nominal motor values using known power levels and conditions. From these nominal values and the effective resistance, various scaling factors based on actual motor power can be generated and used to adjust a nominal flux reference to more accurately reflect actual motor flux. The scaling factors include power and torque scaling factors and a resistance scaling factor that is active during conditions such as wheel slip.

Abstract: An image forming apparatus includes an engine unit used for performing an image forming job, an engine control unit which controls the operation of the engine unit, a brushless direct current (BLDC) motor which drives the engine unit, a sensor unit which senses the driving information of the BLDC motor, a communication interface unit which receives a digital control command with respect to the BLDC motor from the engine control unit, a driving signal unit which generates a driving signal to control the BLDC motor, and a digital control unit which controls the operation of the driving signal unit in a digital PLL manner, based on the received digital control command, the detected driving information and a digital gain value as a control factor with respect to the BLDC motor.

Abstract: An electric drive shaft is disclosed including at least one speed-variable generator for generating a voltage with a variable amplitude and a variable frequency, and at least one speed-variable drive motor supplied with the voltage. The drive shaft enables repercussions on the voltage during sudden load changes, and therefore the complexity of the regulation for stabilising the voltage, to be reduced due to the generator including a supraconductor winding, especially a high-temperature supraconductor winding.

Abstract: A generator assembly including generator means and a first converter member (11), the generator means being arranged to convert mechanical power to electric power and comprising an AC generator (2), a voltage regulator (4) and an AC coupling, the voltage regulator (4) being arranged to regulate magnetization of the AC generator (2) on the basis of data associated with the voltage of the AC coupling of the generator means, the AC coupling being arranged to supply electric power from the AC generator (2) to the first converter member (11), and the first converter member (11) being arranged to rectify the voltage applied through the AC coupling into DC voltage. The first converter member (11) is arranged to adjust the power of the AC generator (2) by changing the component (I q) associated with the torque of the current passing through the AC coupling so as to provide the power of desired magnitude.

Abstract: A controller of a field winding type synchronous motor is provided that can stably output torque even if the d-axis current pulsates by reducing torque pulsation without causing fluctuation in the magnetic flux acting on the torque. A motor control unit 100 performs control so that a desired torque can be generated from a field winding type motor 20 having a field winding 22f on the rotor. Based on a current Id flowing in the d-axis direction out of the current flowing in a stator winding 22a of the field winding type motor 20, the motor control unit 100 calculates an induced voltage Vf2 being induced in the field winding 22f and compensates a field voltage Vf of the field winding based on the induced voltage Vf2, thus suppressing pulsation of the field current flowing in the field winding of the field winding type motor 20.

Abstract: The present invention relates to a self-propelled working machine, especially in the form of a surface milling machine, such as asphalt-milling machine or snow-milling machine comprising a main operating unit and/or a drive unit, which is operable in a steady-state or near steady-state operating status and is drivable by a drive device comprising at least an electrical motor, the electrical motor being associated with a start-up including a frequency converter for the limitation of starting current. The invention also relates to a process for operating such a self-propelled working machine. According to the invention an operating circuit for steady-state operation is provided, comprising a jumper for bridging the frequency converter following starting or reaching steady-state operational status. Optionally, the jumper is switchable to activate or inactivate the frequency converter of the start-up circuit, respectively.

Abstract: A control system and method for a hybrid electric vehicle. One example control system includes a current calculating module to calculate a current, the current being at least one of a current to drive a motor of the vehicle and a current generated by the motor, and a feed controller to selectively implement a first mode when the calculated current is below a predetermined current value and to selectively implement a second mode when the calculated current is more than the predetermined current value, wherein either the first feed circuit or the second feed circuit is used in the first mode and both the first feed circuit and the second feed circuit are used in the second mode.

Abstract: A generator assembly including generator means and a first converter member (11), the generator means being arranged to convert mechanical power to electric power and comprising an AC generator (2), a voltage regulator (4) and an AC coupling, the voltage regulator (4) being arranged to regulate magnetization of the AC generator (2) on the basis of data associated with the voltage of the AC coupling of the generator means, the AC coupling being arranged to supply electric power from the AC generator (2) to the first converter member (11), and the first converter member (11) being arranged to rectify the voltage applied through the AC coupling into DC voltage. The first converter member (11) isarranged to adjust the power of the AC generator (2) by changing the component (I q) associated with the torque of the current passing through the AC coupling so as to provide the power of desired magnitude.

Abstract: A vehicular generator-motor 1 is composed of a rotor, a stator having three phase armature winding 2, and a converter 4. The rotor is provided with a field winding 3 for magnetizing a plurality of magnetic pole pieces 14a, 15a, and permanent magnets 17 for magnetizing the magnetic pole pieces 14a, 15a together with the field winding 3. When the generator-motor 1 is operated as a motor, the converter 4 is operated as an inverter to restrain the armature current at the time of low speed rotation to the extent of the additional magnetic flux from the permanent magnets.

Abstract: A drive train for a hybrid electric vehicle has an engine, first and second motor/generators, a third motor, and a transmission in connecting relationships with the engine, the motor/generators, and the third motor. The transmission has planetary gear sets to be shifted among a plurality of running modes including a large driving force running mode. A controller controls surplus power caused by power balance between the first and second motor/generators to be supplied to the third motor when the surplus power is generated and the vehicle starts with the transmission being operated in the large driving force running mode.

Abstract: A motor assembly includes a keyed on-off switch and at least one 12-volt battery coupled to the existing DC electrical system of the vehicle. A D.C. speed control unit regulates the current to a DC drive motor. A housing is positionable adjacent to a front or rear portion of the vehicle and includes a D.C. motor connected to the DC speed control unit and a 12-volt D.C. alternator. An A.C. generator is operably connected to at least one AC breaker box via the electrical system. A converter is electrically coupled to the existing electrical system and the A.C. breaker box. The system further includes a plurality of electrical outlets and a power switch operably connected thereto and to the A.C. breaker box wherein the outlets conveniently allow a user to supply power to an external device.

Abstract: To provide a light fixture control system with which an inrush current is prevented at the time of motor activation, and a light fixture is prevented from rapidly dimming. In a vehicle including a light fixture to be driven by an output of a generator of the vehicle, and a motor to be driven also by the output of the generator, when the light fixture is driven, the driving current F1 to the motor is duty-controlled.

Abstract: A dynamic braking system for a vehicle, the system comprising an engine, an alternator, a plurality of alternating current (AC) electric traction motors, each coupled in driving relationship to a respective one of a plurality of driven wheels, a plurality of power inverters where each of the traction motors has excitation windings coupled in circuit with a corresponding one of the plurality of power inverters, a fuel-free dynamic braking controller, a fuel-free dynamic braking transfer switch located between one of the plurality of traction motors and the one of the plurality of power inverters in circuit with the corresponding one of the plurality of power inverters, wherein the one of the plurality of traction motors in circuit with the corresponding one of the plurality of power inverters that is separated by the fuel-free dynamic braking transfer switch does not generate and does not consume power, and wherein the fuel-free dynamic braking controller commands one of the plurality of power inverters that i

Abstract: A rotating electrical machine, such as an aircraft starter-generator, includes an exciter that has its stator windings divided into a number of sections. A plurality of switches are electrically coupled to the exciter stator winding sections and are configured and controlled so that the exciter stator winding sections may be selectively coupled in series or in parallel with one another, and selectively coupled to receive either DC or AC power.

Abstract: An improved control method for a dual mode compressor drive arrangement selectively operates an electric machine coupled to the compressor as a motor or a generator during operation of an engine coupled to the compressor for improved efficiency and performance. The machine is operated as a generator to increase the available power for vehicle electrical loads when compressor operation is not needed or when the engine is driving the compressor. Conversely, the machine is operated as a motor to drive the compressor under heavy engine loading or when the engine speed is outside a desired operating range defined in terms of compressor speed.

Abstract: A control device and control method for a hybrid vehicle is disclosed having an electric storage detecting section 13 which detects a state of charge (SOC) of an electric storage device 10. A target running efficiency calculating section 14 serves as a unit to calculate a target value of a running efficiency, indicative of a proportion of a given physical quantity, in terms of a drive power rate required for driving the vehicle such that the higher the SOC detected value, the smaller will be the target value.

Abstract: A drive circuit for a motor/generator, having a first rotating electrical machine which is mainly used as a motor and a second rotating electrical machine which is mainly used as a generator, is characterized in that a booster circuit is disposed at a position where the current for rotating the first rotating electrical motor cancels out with the current generated by the second rotating electrical machine. In this manner, the booster circuit comprising small capacity elements can be used in the drive circuit for the motor/generator.

Abstract: The present invention provides a motor drive controller for a vehicle having an engine and a motor disposed therein as a vehicle-propulsion system, the motor having both driving and power-generating functions, comprising: an engine controller for controlling a running state of the engine; motor controller for controlling both driving and power-generating states of the motor in a manner independent of control over the engine taken by the engine controller; vehicle velocity-detector for detecting the speed of the vehicle and engine speed-detector for detecting revolutions of the engine; and engine load-detector for detecting an engine load. The motor controller includes a map defined by respective detection signals from the vehicle velocity-detector and the engine speed-detector, enabling gear position to be calculated.

Abstract: A vehicle is provided with an engine and a motor, which has driving and electric generating functions and which is directly connected to the engine as a vehicle propulsion system, an engine controller for controlling the operating condition of the engine, and a motor controller for controlling the driving and electric generating conditions of the motor based on the operating condition of the engine and the driving condition of the vehicle independently from the control of the engine made by the engine controller. The vehicle runs by only utilizing its engine by simplifying the control of the engine and motor, and by improving the reliability of the motor controller.

Abstract: An electronic control unit for controlling an inverter mounted between a main battery and a motor in an electric vehicle includes a feed-back control device which ensures that an actual electric power calculated from an electric current and a voltage inputted to the inverter is equalized to a target electric power calculated from the motor revolution-number, an accelerator opening degree and a shift position. If a circuit between the main battery and the motor is opened during regenerative operation, so that the charging of the main battery with a regenerative electric power cannot be performed and as a result, the voltage is increased to exceed a predetermined value, a regeneration prohibiting device prohibits the regenerative operation of the motor to prevent damage to the inverter due to a counter-electromotive voltage of the motor.

Abstract: The drive arrangement for a motor vehicle includes an internal combustion engine (1) with at least one controlling element (29), an electric generator arrangement (3) driven by the internal combustion engine (1), at least one electric motor (11) which is powered by the generator arrangement (3) and drives the motor vehicle, and an electronic control unit (19) which, depending on the setting of an accelerator pedal (23), controls at least an actuating drive (27) and the electrical output generated by the generator arrangement (3) and/or the electrical output received by the electric motor (11). The arrangement contains a device for detecting an actual value of the speed of the internal combustion engine (1) and component for detecting an actual value of the electrical output generated by the generator arrangement (3).

Abstract: A system and method for controlling power transfer between an internal combustion driven electrical power generator and a direct current (DC) motor. In one form, the invention includes control of a power inverter in a manner to restrict current through a winding of the generator to a predetermined polarity. The inverter includes a plurality of gate controlled switching devices which are selectively energized to allow current to free wheel through the motor during at least some portion of each alternating voltage cycle of the generator. In another form, a plurality of resistors are connected in series with an inverter and a DC motor with each resistor including a switching device for bypassing current around the associated resistor. In this form, resistors can be selectively inserted into the series path during electrical braking so that a maximum amount of electrical energy can be transferred to the generator through the inverter without exceeding the voltage limits of the inverter during high speed braking.

Abstract: A variable frequency drive for a motor-generator/alternator set which is used to supply electrical power to computer or data processing equipment. Power failures in commercially supplied power results in aberrations and erroneous computations in computers and data processing equipment. An induction motor is used to drive a generator/alternator. The induction motor is driven below the synchronous speed of the generator/alternator and a variable speed drive increases the velocity supplied to the generator/alternator, preferably to a point above its synchronous speed. Therefore, when there is a commercial power failure, the generator/alternator remains within a desired frequency range for a longer period of time than a comparable generator/alternator driven at synchronous speed.