This is the famed back EMF or back ElectroMotive Force.
To suppress breakage of a drive circuit of a switching element due to a back electromotive force of an inductor.
The method may also include calculating one or more back electromotive force (BEMF) voltages based on the one or more currents.
The meter electronics (20) contain a mimetic circuit (414, 802, 902) that permits use of the driver as a signal pickoff which provides a measurement of back electromotive force for use in calculating mass flow rate and density from the Coriolis flowmeter.
The method may include adjusting the exciting voltages based on the one or more back electromotive force (BEMF) voltages and the phase angle difference between the calculated back EMF voltages and the measured currents.
The structure can improve the wave of the counter electromotive force of a motor.
Relation Speed and counter electromotive force with constant flow
A unit for preventing a counter electromotive force of a battery.
When the switching circuit (140) is off, a counter electromotive force and a countercurrent are supplied to the battery.
The current sensor (14) measures an induced current caused by counter electromotive force of a motor (MG).
The capacitor discharges the captured portion of the counter EMF to reenergize the inductor coil during subsequent positive half-cycles.
A Counter EMF regulator receives a reference signal corresponding to the desired speed, and a signal proportional to CEMF for feedback.
The more complex the application, the more important parameters such as concentricity, counter EMF, efficiency, resonance frequencies, etc. become.
The capacitor is connected in parallel with the DC bus and captures a portion of a counter EMF resulting from de-energizing the inductor coil during negative half-cycles.
The electromotive forces (emf) of the coil sections are connected by pairs symmetrically and towards each other in the opposite winding paths of the armature, thereby partially compensating a counter emf.
The frequency of the back EMF signal is determined from the zero crossings of the EMF signal.
The motor (36) may be capable of generating a counter-electromotive force.
A back EMF generating device, e.g., a battery, which generates a back EMF (Vbat) with power transfer, is attached to the secondary circuit.
This phenomenon is known as counter-electromotive force.
The servo motor also comprises a counter-electromotive force detection coil (4).
On reconnection of a load generating a significant back emf, the 2-step process is initiated when the back emf is substantially in phase with the phase of the supply voltage.
This reverse pulse reduces the magnitude of the ringing in the back EMF signal.
As an alternative, the available back EMF energy may be dissipated into the system.
Average back electro motive force (BEMF) values of the motor are calculated between the two different times.
It comprises for each tongue an EMF measuring circuit (34) and provides during operation, an output signal which represents the counter-EMF generated by the relative tongues.
Counter-electromotive force and inductance acquired via induction by the transducer during working process are mutually canceled.
The winding is excited in advance of zero- crossings of back EMF by an advance period and is excited for a conduction period over each electrical half-cycle of the motor.
Furthermore, a voltage (Vd) in a cable connecting a battery (VB) and the semiconductor switch (11) is measured, and in the case where a counter-electromotive force is generated and the voltage (Vd) is reduced, the threshold current (Iref) is reduced.
A back emf is a resistance to change in a magnetic field.
Back EMF zero-cross detectors determine the electrical timing relationships during each electrical cycle.
Requêtes fréquentes français :1-200, -1k, -2k, -3k, -4k, -5k, -7k, -10k, -20k, -40k, -100k, -200k, -500k, -1000k,
Requêtes fréquentes anglais :1-200, -1k, -2k, -3k, -4k, -5k, -7k, -10k, -20k, -40k, -100k, -200k, -500k, -1000k,
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