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Fuel cell is a promising electric vehicle power supply, but has disadvantages of poor dynamic performance and short service life. To solve the disadvantage, a method of hybrid power supply of fuel cell and super capacitor is adopted in the dynamic process, the super capacitor helps fuel cell enter the steady state. In this paper, the topology of the whole system is introduced, which use two DC/DC...
A traction motor system of electric vehicles (EVs) requires wide torque-speed operation range, high efficiency, and low torque ripple according to its driving point. To achieve the requirements without increasing motor size, a novel variable characteristics motor system is proposed in this paper. A winding structure is studied to reduce unprofitable conductor which makes conduction loss. The developed...
This paper is investigated to increase fuel economy of motor for electric vehicles (EVs) traction system. Low torque region of EV motor is frequently-used point in usual urban driving and in fuel economy measurement. Pulse-width modulation (PWM) carrier harmonic iron loss takes up high percentage for EV motors in this region. This paper reveals the relationship between phase current and carrier harmonic...
In this paper, conversion of existing Internal Combustion Engine (ICE) based vehicle into an electric vehicle is discussed. Such a configuration saves the investment in development of a completely new electric drivetrain. The ICE is replaced with electric drive while keeping rest of the transmission as it is. Thus, field weakening capability is not essential for the motor and surface permanent magnet...
This paper describes the characteristics of a new concept motor which uses combined magnet motive forces for an application of Electric Vehicles. The motor is a surface type PMSM and two kinds of magnet motive forces which are called a Compound Magnet Motive Forces (CMMF) can be used by the special magnet arrangement. By adding the current to match each of the magnet motive forces, this machine can...
This paper presents a leading angle flux-weakening control method for the wide-speed operation of permanent magnet synchronous motor (PMSM). The angle offset of flux-weakening is gained by integraling the error of given index and calculation index, which is the utilization of motor's terminal voltage to the voltage of DC bus, and then a voltage loop is established to maintain the stability of flux-weakening...
This paper proposes a new adaptive fuzzy active disturbance rejection control design technique on permanent magnet synchronous motor (PMSM). Fuzzy logic control is applied to adjust the proportional coefficient of nonlinear proportional error control (NLPE). The extended state observer (ESO) is used to track and estimate the uncertainty of PMSM system including unmodeled dynamics, load disturbances...
Electric Vehicle (EV) is a dream for the human being city traffic without exhausting gas and with low noise. Permanent magnet synchronous motor (PMSW) became at the top of AC motors in high performance drive systems such as EV. This paper describes a full digital system to control a PMSM used in EV driving by TMS320F2812 DSP. Based on the analysis of the mathematical model of PMSM, the constant torque...
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