H - Electricity – 02 – P
Patent
H - Electricity
02
P
H02P 7/29 (2006.01) H02P 5/16 (1990.01)
Patent
CA 2110304
Abstract: Motor control arrangement, and shaver comprising such a motor control arrangement. A motor control arrangement comprises a control circuit for controlling the speed of an electric motor (EM), which control circuit comprises a measurement resistor (MR) and a switching transistor (ST) having a control electrode and a main current path coupled in series with the electric motor (EM) and the measurement resistor (MR), a pulse width control stage (PW) coupled to the control electrode of the switching transistor (ST), a motor current measurement stage (MI) for controlling the pulse width control stage (PW) in response to a motor current of the electric motor (EM), and a motor voltage measurement stage (MV) for controlling the pulse widthcontrol stage (PW) in response to a motor voltage (EM) of the electric motor (EM). In order to improve the speed control the motor current measurement stage (MI) comprises a voltage-current converter (M3, M4; Al) having an input coupled to a first terminal (3) coupled to the electric motor (EM) and having an output coupled to the pulse width control stage (PW), the voltage-current converter (M3, M4; Al) being adapted to realize a motor current transformation, and the motor voltage measurement stage (MV) comprises a resistor (R1) and a first current mirror (Ml) having an input coupled, by a resistor (R1), to a second terminal coupled to the electric motor (EM) and having an output coupled to the pulse width control stage (PW). (Figure 1)
Fronen Robert Jan
Schoofs Franciscus Adrianus Cornelis Maria
Van Leest Paulus Johannes Carolus
Fetherstonhaugh & Co.
Koninklijke Philips Electronics N.v.
LandOfFree
Motor control arrangement, and shaver comprising such a... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Motor control arrangement, and shaver comprising such a..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Motor control arrangement, and shaver comprising such a... will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-1800995