Two-motor single-inverter field-oriented induction machine drive dynamic performance

Abstract

Multi-machine, single-inverter induction motor drives are attractive in situations in which all machines are of similar ratings, and operate at approximately the same load torques. The advantages include small size compared to multi-inverter system, lower weight and overall cost. However, field oriented control of such drives is a challenge since no two motors will have exactly the same operating conditions at any time. In general, at least some motors in the system will operate away from perfect field orientation. It is therefore important to analyse their torque dynamics carefully. This paper discusses existing multi-machine field-oriented control methods, and analyses and compares them from the viewpoint of dynamic performance. For this, an analytical framework based on small-signal analysis is developed to compare multi-machine control methods. This analysis is verified by simulations and experiments.

Research of Scalar Control System of Two Traction Induction Motors From by One Inverter

“…Система побудова за принципом «ведучийведений» таким чином, що «ведучим» стає більш навантажений двигун і система керування орієнтується на його змінні стану, а той час як «ведений» двигун живиться напругою тієї ж амплітуди і частоти, що і «ведучий» двигун, проте значення його змінних стану не враховуються при розрахунку керуючих дій. У [5] запропоновано усереднений підхід до керування двома асинхронними двигунами, що живляться від одного інвертора. Отже, керування системою з двох двигунів здійснюється таким чином, начебто вона складається з одного двигуна, вал якого обертається з середньою швидкістю обертання валів двох двигунів, а по його обмоткам протікає середній струм обмоток двох двигунів.…”

Single Inverter Fed Speed Sensorless Vector Control of Parallel Connected Two Motor Drive

“…In addition, to control the speed of parallel connected induction motor drive and to make the drive stable for unbalanced load conditions, nonlinear programming method [11]-[12], rotor flux oriented control scheme with parameter averaging and space vector averaging [13], motors with different ratings [14]- [15], adjustable PI controllers [16], rotor flux feedback control [17], matrix converter with slip frequency vector control [18], one degree of freedom control (1DOF) and two degree of freedom control (2DOF) [19], weighted voltage vector [20], new hybrid control method (speed and torque controller) [21], speedirrelevant motors using weighted flux linkage vector control [22], smart switching technique [23], mean and master slave field oriented control [24] and PI speed and current controllers [25] were employed.…”

Robust control of two parallel‐connected permanent magnet synchronous motors fed by a single inverter

“…Sensorless control has no robustness to the parameter perturbation, and in fact, the parameters of motor vary with the change of environment [20][21][22][23]. Besides, the stability of most of the existing controllers has not been proved in theory like [9,11,[15][16][17]. Moreover, most of controllers have been designed based on the steady-state model of motor rather than the dynamic model of motor, such as [9,11,13,14,16,17], which impacts the dynamic performance of system.…”

“…Moreover, most of controllers have been designed based on the steady-state model of motor rather than the dynamic model of motor, such as [9,11,13,14,16,17], which impacts the dynamic performance of system. In addition, although motor drive systems are faced with unavoidable and unmeasurable disturbances or some parameter variations [24,25], the external disturbances and/or the uncertainty of model have not been considered in many studies like [9,11,[13][14][15][16][17].…”

“…For example, multiple induction motors fed by a single CSI‐based inverter has been achieved in [13]. Master–slave strategy (MSS) has been developed for multi‐parallel permanent magnet synchronous motors (PMSMs) in [14], and the average control has been adopted for two induction motors in [15]. Moreover, speed‐sensorless vector control has been designed in this field owning to its advantages of high performance, high reliability, low cost, and less maintenance [16, 17].…”