Siemens Vdo Automotive Corporation

Siemens Automotive Corporation

Siemens Canada Limited

Siemens Electric Limited

Other

Brose Fahrzeugteile Gmbh & Co. Kommanditgesellschaft, Wūrzburg

John Edward Makaran

Andrew Lakerdas

Ke Liu

Peter A Kershaw

Attila Simofi-Ilyes

Corneliu Dragoi

Martin Volkening

Marek Horski

Frank Stauder

Jerzy Muszynski

Sergey Tyshchuk

Johannes Brouwers

Dragan Radavcovic

Murray Van Duynhoven

John William DeWys

Erich Maier

Scott Kirkpatrick

Dragan Radakiovic

A method of connecting stranded wire to a lead-frame bodyincludes the provision of a stranded wireIt is ensured that insulation is stripped from an endof the stranded wire. An electrically conductive lead-frame connection structureis associated with the lead-frame body. The endof the stranded wire is inserted into the lead-frame connection structureso that the lead-frame connection structure substantially surrounds the wire end. Solder flux is injected so as to be substantially about a portion of the end of the stranded wire. The lead-frame connection structure is placed in contact with a bottom resistance welding electrodeor a top resistance welding electrodeThe electrode that is not presently in contact with the lead-frame connection structure is moved so as to contact the lead-frame connection structure to resistance weld the wire endto the lead-frame connection structureand thereby define a solder crimp connectionof the wire end and the lead-frame connection structure.

Resistance welded solder crimp for joining stranded wire to a copper lead-frame

A dual motor arrangement includes a first motor M, a first MOSFET Qconstructed and arranged to control operation of the first motor, a second motor M, a second MOSFET Qconstructed and arranged to control operation of the second motor, an RFI filter structure L, C_RFI, a freewheeling circuit L, C, and a controller S. The controller is constructed and arranged to provide a first PWM signal to the first MOSFET and a second PWM signal to the second MOSFET. The second PWM signal is in staggered time relation with respect to the first PWM signal. When one motor is in a freewheeling mode of operation for at least a portion of a time that the MOSFET, associated with the other motor, is on, freewheeling of the one motor decreases an amount of current drawn by the other motor during turn on of the other motor. The inductors L, Lcan be coupled to define a transformer.

Dual motor arrangement and control method

A stator and armature assemblyis provided for a permanent magnet DC motor. The assembly includes an armaturehaving a lamination coreand windings, and a stator structureassociated with the armature. The armature is constructed and arranged to rotate with respect to the stator structure. The stator structure includes at least one permanent magnetproviding a certain flux, and at least one wound core structurehaving a coreand a coilwound about the core so as to define an alternate pole with respect to the permanent magnet. When current to the coil is controlled, flux of the stator structurecan be increased or decreased relative to the certain flux. In this way a motor can operate at different speeds.

Flux modifier for a permanent magnet brush-type motor using wound field coils combined with permanent magnets

A closed-loop systemis provided for controlling a DC motor. The system includes a DC motor, a controllerassociated with the motor and constructed and arranged to control operation of the motor, a voltage sensorconstructed and arranged to measure a voltage supplied to the motor, a speed sensorassociated with the motor and constructed and arranged to obtain a measured speed of the motor, and a conditioning circuitconstructed and arranged to receive a speed signal and condition the speed signal to provide to the controller, a nominal speed based on the voltage supplied to the motor, or nominal rate of acceleration or deceleration upon a change in the desired speed. The controlleris constructed and arranged to compare the measured speed with a certain speed, that is less than the nominal speed, at a voltage corresponding to a measured voltage, and if the measured speed is less than the certain speed, a fault condition is defined by the controller. The controlleris also constructed and arranged to compare the measured rate of change of speed with a desired rate of change of speed, that is more than the nominal rate of change of speed in the case of motor acceleration, or less than the nominal rate of change of speed in the case of deceleration, at a voltage corresponding to a measured voltage, and if the measured rate of change of speed differs significantly from the expected rate of change of speed, a fault condition is defined by the controller.

Overload protection for DC motors

A dual motor configurationincludes a primary brushless motorelectronically controlled to be driven at various speeds throughout a range of motor speeds. A secondary brush motorelectronically controlled be driven at various speeds throughout a range of motor speeds. The secondary brush motor includes an electronic switching deviceassociated therewith for receiving a pulse width modulated signal for controlling speed of the secondary brush motor. Thus, different combinations of speeds, throughout the ranges of motor speeds, of the first and second motors can be selectively chosen.

Electronic variable speed control of dual motor configuration

A brush type DC motorhaving an armatureand positive and negative power leads is provided. The motor includes an RFI chokeas a transformer in series with at least one of the positive and negative power leads to amplify current such that rotation of the armaturecan be detected based on monitoring a voltage relating to the amplified current. Conditioning circuitryis constructed and arranged to condition the voltage for detecting rotation of the armature.

Coupled RFI choke as stall detection means for brush type DC motor

A dual motor configurationis provided for driving two fans for moving air to cool an engine. The dual motor configuration includes a primary brushless motorconstructed and arranged to be electronically controlled to drive a first fanover a range of speeds. A secondary brush motoris constructed and arranged to be electronically controlled to drive a second fanover a range of speeds. The secondary brush motor includes an electronic switching deviceassociated therewith for receiving a pulse width modulated signal for controlling speed of the secondary brush motor. Thus, different combinations of speeds of the first and second motors can be selectively chosen to meet cooling requirements.

Dual motor configuration with primary brushless motor and secondary integrated speed control motor

A circuitfor a five phase DC brushless motor includes a first coil A and a first primary switch Sfor controlling current through the first coil; a second coil B and a second primary switch Sfor controlling current through the second coil; a third coil C and a third primary switch Sfor controlling current through the third coil; a fourth coil D and a fourth primary switch Sfor controlling current through the fourth coil; a fifth coil E and a fifth primary switch Sfor controlling current through the fifth coil. The first coil A is arranged to have a polarity of back EMF opposite of that of the third coil C; the second coil B is arranged to have a polarity of back EMF opposite of that of the fourth coil D; the third coil C is arranged to have a polarity of back EMF opposite of that of the fifth coil E, the fourth coil D is arranged to have a polarity of back EMF opposite of that of the first coil A; and the fifth coil E is arranged to have a polarity of back EMF opposite of that of the second coil B. The circuit further includes a first freewheeling current conducting switch Sand a diode A between the first coil and the third coil; a second freewheeling current conducting switch Sand a diode between the second coil and the fourth coil; a third freewheeling current conducing switch Sand a diode between the third coil and the fifth coil; a fourth freewheeling current conducting switch Sand a diode between the fourth coil and the first coil, and a fifth freewheeling current conducting switch Sand diode between the fifth coil and the second coil.

Quasi bipolar topology for brushless motors

A method and system for determining the commutation position in a DC machine using a single-bit rotor sensor and the back EMF signal from a stator winding by calculating a delay value, which is equal to the time elapsed between detection of the position signal and the back EMF signal, and establishing commutation after a period of time equal to the delay value has elapsed from when the position signal is detected.

Method and system for determining electronic commutation in brushless DC machines irrespective of the placement of rotor position sensors

A cooling system includes multiple cooling fans, each driven by a corresponding fan motor controller. Each fan motor controller includes electronic commutation circuitry that is responsive to a modulated signal to control the speed of the associated motor and fan. The controller for one motor includes a microcontroller that receives a single control signal from an external control unit and translates that control signal into the modulated signals provided to all of the other motor controllers. In one embodiment, the microcontroller can adjust the duty cycle of the modulated control signals, and can stagger the on-off times of the signals to minimize conducted RFI emissions.

Multiple electronically commutated motor control apparatus and method

A method of starting a brushless DC motor at any initial speed (A) establishes a initial stator-field speed and setting a counter of synchronization, (B) measures a speed of a rotor of the motor, (C) compares the speed of the rotor with the stator-field speed to determine if the rotor is synchronized with the stator-field. If the rotor is not synchronized with the stator-field, the method includes (a) re-setting the counter of synchronization, (b) increasing an acceleration portion of motor current (I ) to enhance torque, (c) setting the stator-field speed higher than the rotor speed, (d) calculating a period of an open-loop timer, (e) calculating a value for a load portion of the motor current (I ), where total motor current I&equals;I &plus;I , (f) performing commutation based on the open-loop timer and returning to step (B) until the rotor is synchronized with the stator-field. If synchronization of the rotor and stator-field is determined, the method includes incrementing the counter of synchronization, determining if the counter is greater than a certain value, and if the counter is greater than the certain value, switching from open-loop commutation to closed-loop commutation. If the counter is not greater than the certain value, the method includes proceeding to step (c).

Speed-based open-loop start-up method for brushless DC motor

A closed-loop control system for a DC motor includes a DC motor , a current sensor for determining a current of the motor, a voltage sensor for measuring a voltage of the motor , and a micro-controller . The micro-controller is constructed and arranged to (1) compare the determined current with a set point and output a pulse width modulated (PWM) duty cycle to control the motor, and (2) calculate a PWM duty cycle limit based on the measured voltage and compare the outputted PWM duty cycle to the PWM duty cycle limit such that when the outputted PWM duty cycle greater than the PWM duty cycle limit, the outputted PWM duty cycle is set to the PWM duty cycle limit. A method, in a DC motor, of preventing a current surge during severe voltage changes is also disclosed.

Current limitation process of brush and brushless DC motors during severe voltage changes

A system provides a variable output voltage to a DC brush motor. The system includes a DC brush motor , a DC voltage source , a step-up, step-down DC/DC converter including a switch . The DC/DC converter is constructed and arranged to step-up and step-down voltage from the source to provide an output voltage to the motor between 0 and 42 volts. A control unit is constructed and arranged to receive an input signal and to control the switch based on the input signal to control the motor.

12/42 volt DC brush motor control system

A motor circuit includes a first brush-type motor, a second brush-type motor, a switch, and a pulse width modulation circuit. The first brush-type motor has a first voltage connection and a second voltage connection, the second voltage connection adapted to be coupled to a source of DC voltage. The second brush-type motor has a third voltage connection and a fourth voltage connection, the fourth voltage connection adapted to be coupled to the source of DC voltage. The switch has a control input, a first contact and a second contact, the first contact coupled to the source of DC voltage, and the second contact coupled to the first voltage connection and the third voltage connection. The switch is operable to selectively connect the first contact to the second contact based on a voltage at the control input. The pulse width modulation circuit is operable to generate a pulse width modulated (PWM) signal. The pulse width modulation circuit is operably coupled to provide the PWM signal to the control input of the switch.

Growing community of inventors

London, Canada

John Edward Makaran