| Patent Number |
Title Of Patent |
Date Issued |
| 7554280 |
Monitoring device of rotor position of an electric motor and corresponding method |
June 30, 2009 |
| A monitoring device for an electric motor has in input a signal representing zero crossings of the back-electromotive force of the motor and comprises a monitor that detects the signal in first periods of time arranged around instants of time in which the zero crossings are expected. |
| 7525268 |
Control device for an electric motor and related method |
April 28, 2009 |
| A control device controls an electric motor that includes a winding and generates a back electromotive force. The device comprises a first circuit suitable for setting time periods each centered on the time instant of an expected zero crossing of the winding current and a second circ |
| 7235939 |
Method for detecting the angular position of a rotor in a brushless electric motor |
June 26, 2007 |
| A method for detecting the angular position of a rotor in a brushless electric motor, of the type in which the emission of a polarity signal of the back electromotive force by a detection circuitry associated with the motor, includes the using a bi-directional counter for counting the |
| 7164244 |
Apparatus for controlling electric motors and related control method |
January 16, 2007 |
| An electric motor controller controls the currents flowing through the phase windings of an electric motor. The electric motor controller includes driving stages for driving respective phase windings of the motor and a memory for storing samples of reference signals. The driving stag |
| 6949906 |
Driving circuit and method for preventing voltage surges on supply lines while driving a DC moto |
September 27, 2005 |
| A driving circuit of a DC motor includes a control circuit for providing a control signal, and a motor drive circuit commanded by the control circuit for providing respective command signals for the switches of an output power stage connected to the DC motor. The output power stage is co |
| 6541936 |
Start procedure for brushless motors |
April 1, 2003 |
| A start-up procedure for a multiphase brushless motor to be accelerated until reaching a certain speed includes determining the starting position of the rotor and performing an excitation phase including forcing a drive current in the phase windings of the motor for an established period |
| 6420847 |
Device for detection of current or voltage on a PWM driven winding with reduced jitter and relat |
July 16, 2002 |
| A method for detecting a zero-cross event of an induced back electromotive force (BEMF) or of a nullification instant of a periodic current in a PWM driven winding, by circuits generating an analog signal representative of the induced BEMF or of the nullification instant of the periodic |
| 6249101 |
Start-up procedure for brushless DC motors having position sensors with angular resolution lower |
June 19, 2001 |
| A start-up routine is provided for a multiphase brushless DC motor having one or more rotor position sensors insufficient to provide for an angular resolution as high as the angular resolution of the synchronized driving system of the motor. The start-up routine includes setting at least |
