摘要:
A novel motor controller (100) controls a stepping motor (1) and includes a command value calculator (101) to calculate and output a speed command value (ωtgt) and an angle command value (θtgt) based on a reference clock. A control method selector (111) is included to select one of the open-loop control and the closed-loop control in accordance with the speed command value (ωtgt). A command value output unit (103, 104) is included to output a first target value as the first current command value (idt) when the open-loop control is selected and outputs a second target value as the second current command value (iqt) when the closed-loop control is selected. The motor controller (100) controls the stepping motor (1) based on the first target value (idt) when the open-loop control is selected and the second target value (iqt) when the closed-loop control is selected.
摘要:
A vector control device that controls an electric power converter 2 that converts DC power to AC power and supplies the AC power to an AC electric motor 1, includes a vector control unit 3 computing an output voltage output from the electric power converter 2 according to vector control based on torque command and flux command and generating a PWM signal for controlling the electric power converter based on the output voltage, a first flux-command generation unit 11a generating a flux command for asynchronous PWM mode, and a second flux-command generation unit 11b generating a flux command for synchronous PWM mode. When an output frequency of the electric power converter 2 is lower than predetermined value, a flux command generated by the first flux-command generation unit 11a is input to the vector control unit 3, and when the output frequency of the electric power converter 2 is equal to or higher than predetermined value, a flux command generated by the second flux-command generation unit 11b is input to the vector control unit 3.
摘要:
A method for controlling a rotation rate of an electric motor is provided. The method comprises following steps: judging whether an absolute value of a difference between an objective rotation rate of the electric motor and an actual rotation rate of the electric motor is greater than or equal to a predetermined value; and if yes, compensating a q axis current of the electric motor to adjust the rotation rate.
摘要:
An electric motor control system includes a power inverter and control circuitry configured to control the power inverter either according to a target voltage in a voltage-based control mode or according to a target current in a current-based control mode. A controller is operable to switch operation of the control circuitry between the voltage-based control mode and the current-based control mode. The controller may be configured to operate the control circuitry in the current-based control mode at lower motor operating speeds where stator current margin is of greater significance, and to operate the control circuitry in the voltage-based control mode at higher motor operating speeds where stator voltage margin is of greater significance.
摘要:
To present a motor drive control device capable of realizing high speed driving by a simple power feeding control method. The motor drive control device of the invention has a three-phase full bridge circuit for adjusting the feeding phase so as to invert the terminal voltage in feeding-off time, by cyclically repeating positive direction feeding period, non-feeding period, negative direction feeding period, and non-feeding period. In high speed driving, the phase is adjusted so as to invert the terminal voltage right after feeding-off, and if not reaching the desired rotating speed, the feeding time is shortened. As a result, the phase angle to the actual applied voltage can be advanced, and high seed rotation by weak-field system driving is realized. When there is a sufficient allowance in the voltage, the phase is adjusted so as to invert the terminal voltage immediately before turning on the feeding, and the feeding time width is adjusted so that the phase relation of the feeding-off time and the terminal voltage inverting time may be a desired relation and the applied voltage and the current phase are optimized, and the maximum efficiency driving is realized.
摘要:
Cette chaîne de traction (10) pour un véhicule de transport comprend un moteur électrique (12) comprenant un arbre (22), un stator (24) et un rotor (26), un système d'alimentation (14) recevant une tension continue d'entrée (U DC ) et délivrant une tension polyphasée au moteur (12), le système (14) présentant un taux de modulation égal à l'amplitude en tension de chaque phase du moteur divisée par la tension continue d'entrée (U DC ), et un capteur (20) de la vitesse de rotation du rotor (Vrotor). Cette chaîne de traction (10) comporte des moyens de variation du taux de modulation propres à diminuer le taux de modulation par rapport au taux de modulation en l'absence de moyens de variation du taux de modulation, lorsque la vitesse de rotation du rotor (Vrotor) appartient à un premier intervalle de valeurs inférieures à une valeur prédéterminée de transition, et propres à augmenter le taux de modulation par rapport au taux de modulation en l'absence de moyens de variation du taux de modulation, lorsque la vitesse de rotation du rotor (Vrotor) appartient à un second intervalle de valeurs supérieures à la valeur prédéterminée de transition.
摘要:
Die Erfindung betrifft ein Verfahren sowie eine Vorrichtung zur Regelung einer Drehfeldmaschine (14), insbesondere einer Synchronmaschine, bei der eine Längsspannung (Ud) und eine Querspannung (Uq) als Stellgrößen der Regelung ermittelt werden, und die einen Pulswechselrichter (12) umfasst, der die Phasenspannungen der einzelnen Phasen (U,V,W) erzeugt und in Abhängigkeit vom Betriebsmodus der elektrischen Maschine (14) entweder im PWM-Betrieb oder im Blockbetrieb angesteuert wird. Zur Vereinfachung der Hardwarekomponente (2) der Regelvorrichtung wird vorgeschlagen, PWM-Steuersignale (20,23,24) und Block-Steuersignale (21,25,26) mittels einer Software (1) zu erzeugen und diese einer PWM-/Blocksignal-Einrichtung (18) in Abhängigkeit vom Betriebsmodus zuzuführen, wobei die Einrichtung (18) in der Lage ist, in Abhängigkeit vom zugeführten Steuersignal (23,24 bzw. 25,26) entweder PWM- oder Blocksignale (27 bzw. 28) als Ansteuersignal für den Pulswechselrichter (12) zu erzeugen.
摘要:
The invention relates to a method for controlling an electrical machine (1) that comprises a field winding (2) and a stator winding (3). An inverter bridge (5) is mounted on the output terminals (10) downstream of said stator winding (3). The electrical machine (1) can be operated in the control ranges field-oriented control (11), field weakening mode (12) and diode mode (13). The transition from one of the control ranges (11, 12, 13) to the corresponding adjacent of the control ranges (11, 12, 13) is established by an overmodulation of the pulse-width modulation (26) and by limiting the outputs of current regulators (34, 35) of the stator winding (3) of the electrical machine (1).