Brushless DC Electric Motor Speed Control and Power Factor Correction Using Single-Ended Primary Inductor Converter
In this treatise, Brushless DC electric motor (BLDC electric motor), Power Factor Correction (PFC), and control of speed using Single-Ended Primary Inductor Converter (SEPIC) are articulated. An original approach is proposed for the controlling of motor s
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Keywords BLDC electric motor SEPIC Speed control correction Discontinuous inductor current mode
Power factor
S. Bikash (&) Department of Power Electronics & Drive, SRM University, Chennai, India e-mail: [email protected] S. Anwesha Department of Electrical Engineering, DIT, Kolkata, India e-mail: [email protected] S.B. Mahajan S. Aamer Department of Electrical and Electronics Engineering, MIT, Aurangabad, India e-mail: [email protected] S. Aamer e-mail: [email protected] P. Sanjeevikumar Department of Electrical and Electronics Engineering, University of Johannesburg, Auckland Park, Johannesburg, South Africa e-mail: [email protected] © Springer Nature Singapore Pte Ltd. 2018 A. Garg et al. (eds.), Advances in Power Systems and Energy Management, Lecture Notes in Electrical Engineering 436, https://doi.org/10.1007/978-981-10-4394-9_43
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1 Introduction The brushless direct current (BLDC) motor is becoming very popular because of striking features such as EMI (Electromagnetic Interference) problems, less maintenance, superior efficiency, and flux density [1–4]. BLDC motors are not only limited to the domestic applications, but also suitable for Aero-modeling and industrial applications such as motion control, actuation systems, positioning systems, High voltage AC (HVAC), ventilation, and medical and transportation systems [1–4]. According to load requirement, many converters are employed to step-down or step-up the voltage level [5–7]. In few applications, buck–boost converter provides a solution to increase or decrease the voltage where load voltage requirement is in the range of supply voltage. Single inductor, capacitor, diode, and power switch are required to design a traditional buck–boost converter [1]. However, high ripples are experienced in input current of converter. Highly capacitive or LC filter necessitates for suppress the cause of ripple but makes the buck–boost converter expensive. Brushless DC motor drive using buck–boost converter is proposed to control the speed and block diagram as shown in Fig. 1 [1]. At AC mains inherent PFC is achieved by operating buck–boost converter in discontinuous mode. Figure 2 depicts circuit diagram of brushless DC motor drive using buck–boost converter.
AC to DC Converter
AC Supply
Buck Boost Converter
BLDC Motor
Inverter
Control Unit
Fig. 1 Block diagram of brushless DC motor drive using buck–boost converter
Lf Vs
Cf
Sw1
D1
Sw2
D2
S 2 S4 S6 Cd
Dn
Dp L1
L2
Vdc
BLDC Motor
S 1 S 3 S5
Fig. 2 Circuit diagram of brushless DC motor drive using buck–boost converter
Brushless DC Electric Motor Speed Control and Power Factor …
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An inverting output voltage is obtained through buck–boost converter and fed to the inverter for motor control application. The control unit is employed to control and maintain the switching signal of the system. It senses the speed change of BLDC motor. Inverter input side DC link voltage is managed using converter to control the speed of BLDC motor. DC link
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