Search results
Results from the WOW.Com Content Network
Motor velocity constant, back EMF constant [ edit ] K v {\displaystyle K_{\text{v}}} is the motor velocity, or motor speed, [ 2 ] constant (not to be confused with kV, the symbol for kilovolt ), measured in revolutions per minute (RPM) per volt or radians per volt second, rad/V·s: [ 3 ]
Constant air-gap induction motor equivalent circuit. The circle diagram (also known as Heyland diagram or Heyland circle) is the graphical representation of the performance of the electrical machine [1] [2] [3] drawn in terms of the locus of the machine's input voltage and current. [4]
The term back electromotive force is also commonly used to refer to the voltage that occurs in electric motors where there is relative motion between the armature and the magnetic field produced by the motor's field coils or permanent magnet field, thus also acting as a generator while running as a motor. This effect is not due to the motor's ...
The constants listed here are known values of physical constants expressed in SI units; that is, physical quantities that are generally believed to be universal in nature and thus are independent of the unit system in which they are measured. Many of these are redundant, in the sense that they obey a known relationship with other physical ...
S. Safe Torque Off; Sawyer motor; Scalar control; Series wound motor; Series-parallel switching; Servomotor; Shaded-pole motor; Shaft voltage; Single-molecule electric motor
In mechanics, a constant of motion is a physical quantity conserved throughout the motion, imposing in effect a constraint on the motion. However, it is a mathematical constraint, the natural consequence of the equations of motion, rather than a physical constraint (which would require extra constraint forces).
Gas, other fuels, and motor oil: $2,694 (22% of overall cost) Auto insurance: $1,775 (15% of overall cost) For drivers who want to lower the costs of car ownership, one obvious answer is to buy a ...
Technically, these constants are specified in units of the electrical reactance , although they are typically expressed in the per-unit system and thus dimensionless. Since for practically all (except for the tiniest) machines the resistance of the coils is negligibly small in comparison to the reactance, the latter can be used instead of ...