skip to main content

SciTech ConnectSciTech Connect

Title: Extending the Constant Power Speed Range of the Brushless DC Motor through Dual Mode Inverter Control -- Part I: Theory and Simulation

An inverter topology and control scheme has been developed that can drive low-inductance, surface-mounted permanent magnet motors over the wide constant power speed range required in electric vehicle applications. This new controller is called the dual-mode inverter control (DMIC) [1]. The DMIC can drive either the Permanent Magnet Synchronous Machine (PMSM) with sinusoidal back emf, or the brushless dc machine (BDCM) with trapezoidal emf in the motoring and regenerative braking modes. In this paper we concentrate on the BDCM under high-speed motoring conditions. Simulation results show that if all motor and inverter loss mechanisms are neglected, the constant power speed range of the DMIC is infinite. The simulation results are supported by closed form expressions for peak and rms motor current and average power derived from analytical solution to the differential equations governing the DMIC/BDCM drive for the lossless case. The analytical solution shows that the range of motor inductance that can be accommodated by the DMIC is more than an order of magnitude such that the DMIC is compatible with both low- and high-inductance BDCMs. Finally, method is given for integrating the classical hysteresis band current control, used for motor control below base speed, with the phase advance ofmore » DMIC that is applied above base speed. The power versus speed performance of the DMIC is then simulated across the entire speed range.« less
Authors:
Publication Date:
OSTI Identifier:
788542
Report Number(s):
P01-111874
TRN: US200203%%34
DOE Contract Number:
AC05-00OR22725
Resource Type:
Conference
Resource Relation:
Conference: Conference title not supplied, Conference location not supplied, Conference dates not supplied; Other Information: PBD: 29 Oct 2001
Research Org:
Oak Ridge National Lab., TN (US)
Sponsoring Org:
US Department of Energy (US)
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING; ELECTRIC MOTORS; CONTROL SYSTEMS; ANALYTICAL SOLUTION; DIFFERENTIAL EQUATIONS; HYSTERESIS; INDUCTANCE; INVERTERS; PERFORMANCE; PERMANENT MAGNETS; COMPUTERIZED SIMULATION