A motor controller configured to control different types of electronically commutated motors (ECMs) includes a range of different rotor orientation signal inputs to accommodate differences between ECM motor types. The motor controller includes a control unit that receives motor operation commands and controls operation of the ECM in accordance with the motor operation commands. The control unit receives and stores data designating ECM type and estimates rotor position based on the designated ECM type.

A motor controller configured to control different types of electronically commutated motors (ECMs) includes a range of different rotor orientation signal inputs to accommodate differences between ECM motor types. The motor controller includes a control unit that receives motor operation commands and controls operation of the ECM in accordance with the motor operation commands. The control unit receives and stores data designating ECM type and estimates rotor position based on the designated ECM type.

The invention relates to a generic method for determining the rotor position of an electronically-commutated multi-phase direct current motor, characterized in: (a) generating of a plurality of test voltage pulses in the winding system with a specified switch-on duration ΔT by means of the commuting device in different phase distributed over 360°; (b) measurement of the current values of the current responses of the test voltage pulses on expiration of the switch-on period of the respective test voltage pulse; (c) approximation of the measured current values by means of a periodic approximation function from a superimposition of a preferably sinusoidal fundamental wave with an amplitude IEMK and the associated first harmonic with an amplitude Und as a factor of the phase of the test voltage pulse, wherein the sinusoidal fundamental wave follows the chronological progression of the counter EMF voltage of the stator and the first harmonic follows the chronological progression of the stator of the direct current motor; (d) determination of an amplitude ratio value I.sub.EMF/I.sub.Ind of the fundamental wave and the first harmonic of the approximation function; (e) determination of the rotor position as the EMF angle from the argument of the first harmonic of the approximation function as a factor of the amplitude ratio I.sub.EMF/I.sub.Ind, wherein the EMF angle indicates the phase offset of the sinusoidal progression of the counter EMF voltage of the stator relative to the approximation function and the inductivity angle indicates the phase offset of the sinusoidal progression of the inductivity of the stator relative to the approximation function.

The invention relates to a generic method for determining the rotor position of an electronically-commutated multi-phase direct current motor, characterized in: (a) generating of a plurality of test voltage pulses in the winding system with a specified switch-on duration ΔT by means of the commuting device in different phase distributed over 360°; (b) measurement of the current values of the current responses of the test voltage pulses on expiration of the switch-on period of the respective test voltage pulse; (c) approximation of the measured current values by means of a periodic approximation function from a superimposition of a preferably sinusoidal fundamental wave with an amplitude IEMK and the associated first harmonic with an amplitude Und as a factor of the phase of the test voltage pulse, wherein the sinusoidal fundamental wave follows the chronological progression of the counter EMF voltage of the stator and the first harmonic follows the chronological progression of the stator of the direct current motor; (d) determination of an amplitude ratio value I.sub.EMF/I.sub.Ind of the fundamental wave and the first harmonic of the approximation function; (e) determination of the rotor position as the EMF angle from the argument of the first harmonic of the approximation function as a factor of the amplitude ratio I.sub.EMF/I.sub.Ind, wherein the EMF angle indicates the phase offset of the sinusoidal progression of the counter EMF voltage of the stator relative to the approximation function and the inductivity angle indicates the phase offset of the sinusoidal progression of the inductivity of the stator relative to the approximation function.

In one or more example embodiments, an apparatus to control an elevator may include a motor having a rotor configured to rotate with a magnetic axis to drive the elevator at a speed based on a current applied thereto; and a processor configured to regulate the speed of the elevator without information on a speed or an angle of the rotor from an encoder or motion sensor.

In one or more example embodiments, an apparatus to control an elevator may include a motor having a rotor configured to rotate with a magnetic axis to drive the elevator at a speed based on a current applied thereto; and a processor configured to regulate the speed of the elevator without information on a speed or an angle of the rotor from an encoder or motion sensor.

A motor control apparatus includes: a current supply unit configured to supply coil current to a plurality of coils of a motor by controlling, based on a first command value of excitation current and a second command value of torque current, voltage to be applied to the plurality of coils; a first setting unit configured to set the first command value; a second setting unit configured to set the second command value; and a control unit configured to use first control in starting of rotation of a rotor of the motor, and switch control to second control after rotation speed of the rotor becomes greater than predetermined speed. The first setting unit is further configured to set a value greater than 0 as the first command value before the control unit switches control from the first control to the second control.

A motor control apparatus includes: a current supply unit configured to supply coil current to a plurality of coils of a motor by controlling, based on a first command value of excitation current and a second command value of torque current, voltage to be applied to the plurality of coils; a first setting unit configured to set the first command value; a second setting unit configured to set the second command value; and a control unit configured to use first control in starting of rotation of a rotor of the motor, and switch control to second control after rotation speed of the rotor becomes greater than predetermined speed. The first setting unit is further configured to set a value greater than 0 as the first command value before the control unit switches control from the first control to the second control.

A method and apparatus are provided for controlling a sensorless alternating current induction motor (ACIM) having a rotor and a stator comprising a plurality of stator windings by applying a plurality of phase shifted voltages to the plurality of stator windings in the ACIM such that two energized stator windings are connected to first and second phase shifted voltages to cause rotation of the rotor relative to the stator while a third unconnected stator winding is floating so that a DC bus current and an inducted voltage can be measured from the ACIM and used to compute an estimated rotor speed.

A method and a device for assigning the inductance or admittance to the rotor position of a synchronous machine having a stator and a rotor with or without permanent magnets. In operation, the synchronous machine is activated by way of timed terminal voltages and the inductance or admittance is calculated from the terminal voltages and the measured current response. In this case, the variation of the inductance or admittance over the rotor rotation under the boundary condition of an at least two-dimensional current vector that is unchanged in stator coordinates, is used as key information for the positional assignment.