Abstract:
The invention relates to a method for operating an electronically commutated servo motor (2), wherein the servo motor (2) is activated by a voltage space vector generated in accordance with a commutation pattern on the basis of a predefined torque and a rotor position (L) of a rotor of the servo motor (2) in accordance with an optimization target, wherein an activation range which indicates a range of permissible voltage space vectors is predefined, wherein the servo motor (2) is activated in such a way that only voltage space vectors within the activation range are used.
Abstract:
Embodiments of the present invention provide a device and method for generating initial operating points for controlling an interior permanent magnet (IPM) machine. The method includes loading an inductance lookup- table (S110), first calculating a maximum torque per Ampere (MTPA) trajectory for a first threshold speed based on machine parameters of the IPM machine (S120), second calculating a truncated voltage limit ellipse with monotonicaliy increasing torque for a first speed based on the machine parameters (S130), if the first speed is higher than the first threshold speed, determining an operating trajectory at the first speed (S140) based on at least one of the calculated MTPA trajectory and the calculated truncated voltage limit ellipse, and generating an Id,Iq map that maps an Id value and an lq value to each torque command of a plurality of torque commands for the first speed based on the determined operating trajectory (S150).
Abstract:
A stator (12) has multi-phase stator coils (28u, 28v and 28w) that are wound around a stator core (26) by concentrated winding. A rotor (14) has rotor coils (42n and 42s) that are wound at multiple portions of a rotor core (16) in the circumferential direction and diodes (21n and 21s) that serve as rectifier unit that is connected to the rotor coils (42n and 42s) and that varies the magnetic characteristics of the respective rotor coils (42n and 42s) alternately in the circumferential direction. A rotary electric machine driving system includes a decreasing/increasing pulse superimposing unit that superimposes decreasing pulse current for a pulse-shaped decrease on a q-axis current command for passing currents through the stator coils (28u, 28v and 28w) and that superimposes increasing pulse current for a pulse-shaped increase on a d-axis current command.
Abstract:
A control system (120) for a motor (117) includes a current regulation controller (111) for generating a terminal voltage command. The terminal voltage command is used for converting a supply voltage to a three phase voltage to power a motor (117). The control system (120) also includes a terminal voltage command feedback module (108) for controlling the terminal voltage command. The terminal voltage command feedback module (108) compares the terminal voltage command to a determined voltage limit of the supply voltage and generates a d-axis current adjustment command in accordance with the comparison. The d-axis current adjustment command is used for reducing the terminal voltage command below the determined voltage limit. The control system (120) also includes a summer (119) coupled with the terminal voltage command feedback module (108). The summer (119) adds the d-axis current adjustment command to a d-axis current command received from a lookup table (e.g., 109).
Abstract:
In a method of controlling a reluctance polyphase electric machine (36), in particular an automobile motor, the currents injected into each coil of the stator of the machine (36) are deduced by a transformation of a pair (Id, Iq) of excitation currents (Id) and of armature current (Iq) defined in a reference frame (d, q) rotating with the rotor of the machine, such that: - the excitation current (Id) is composed of a fundamental sinusoidal signal, to which are added successively other odd harmonics of increasing order when the torque setpoint of the machine increases, - the armature current (Iq) is a signal proportional to the estimated or measured electromotive force of the machine.
Abstract:
A motor controlling apparatus including an inverter (6), a voltage detector (14), a rotational speed detector (11), a command value calculating component (1), an inverter controller (4), a state detector (131, 132, 133, 134) and an offsetting component (135). The inverter (6) converts direct-current power to alternating-current power supplied to a motor (8). The voltage detector (14) detects a direct-current voltage, and the rotational speed detector (11) detects a rotational speed of the motor (8). The calculating component (1) calculates current and torque command values, and motor rotational speed. The controller (4) provides a control signal to control the inverter (6) based on the current command value. The state detector (131, 132, 133, 134) detects a control state of the inverter (6), and the offsetting component (135) offsets the detected voltage or rotational speed by an offset amount. The calculating component (1) modifies the current command value based on the offset detected voltage or rotational speed to increase on a negative side a d-axis current command value included in the current command value.
Abstract:
The invention relates to a method for calculating, using a computer, a three-phase regulator of a three-phase system having a three-phase model, the method comprising steps consisting in: generating (10) a two-phase park model (1b) of the three-phase system (1) from the three-phase model of the three-phase system; and calculating (20, 30, 40, 50) the three-phase regulator from the two-phase park model (1 b) of the three-phase system, characterized in that the step consisting in calculating the three-phase regulator from the two-phase park model of the three-phase system comprises steps consisting in: generating (20) a complex-parameter one-input/one-output model (1c) from the two-phase park model (1b) of the three-phase system (1); calculating (30) a complex-parameter one-input/one-output regulator (2c) for the complex-parameter one-input/one-output model (1c); and calculating (40, 50) the three-phase regulator from the complex-parameter one-input/one-output regulator (2c).