Variable structure bridge/half-bridge electronic commutator for PM BLDC motor supply

Krykowski, K.; Bodora, A.

doi:10.1109/isie.2005.1529044

Cited by 4 publications

(9 citation statements)

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“…A more thorough discussion on the properties of the drive has been presented in [19][20][21]. In order to implement both structures, a special topology of a converter with additional switches has been proposed.…”

Section: Reconfigurable Structure Electronic Commutatormentioning

confidence: 99%

A reconfigurable structure electronic commutator for a dual BLDC motor EV drive

Biskup¹,

Bodora²,

Domoracki³

2012

Bulletin of the Polish Academy of Sciences: Technical Sciences

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Abstract. An electronic commutator that can drive a PM BLDC motor either in the full bridge or half bridge configuration has been developed. This commutator allows increasing the motor speed over the nominal value, hence the motor is able to operate within a wide constant power speed range. An application of the commutator with a reconfigurable structure for the double drive of a small electric vehicle Elipsa has been presented. The driveline consists of two independent commutators feeding the motors coupled by gears with rear wheels of the vehicle. Both commutators are controlled by a common control system based on a signal microcontroller. The results of road tests indicate new areas of BLCD motor drives application. The fact that the BLCD motor work in the second speed range does not require any changes in the motor construction and at the same time does not significantly deteriorate the drive efficiency is an indisputable advantage of the presented solution.

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Section: Reconfigurable Structure Electronic Commutatormentioning

confidence: 99%

A reconfigurable structure electronic commutator for a dual BLDC motor EV drive

Biskup¹,

Bodora²,

Domoracki³

2012

Bulletin of the Polish Academy of Sciences: Technical Sciences

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“…In comparison with commutator-type motors they are characterized by higher efficiency, smaller dimensions, longer life-time and higher overload capacity [6,11]. Drive systems with PM BLDC motors are extensively used in small and medium power appliances [7,18]. These motors are used often in model electric vehicles, in dentistry and lots of other devices such as compressors or machine tools [1,4].…”

Section: Introductionmentioning

confidence: 99%

Constant Current Models of Brushless DC Motor

Krykowski

Hetmańczyk

2013

Electrical, Control and Communication Engineering

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Two constant current models of Permanent Magnet Brushless Direct Current Motor (PM BLDC) are presented in the paper. In the first part of the paper principle of operation, basic properties and mathematical equations describing PM BLDC models are given. Then, two different constant current models of PM BLDC motor are considered: In the first model, PM BLDC motor is approximated with dc motor; in the second model, modified constant current model is applied with additional block, which is used to take into account the impact of inductance on torque-speed characteristics. In order to verify these models, torque-speed characteristics have been determined and compared for different motor supply voltages. After running a series of simulation and laboratory tests, we have found that this modified model (which makes allowance for the influence of inductance on torque-speed characteristics) ensures obtaining torque-speed characteristics identical to those of the real motor. Therefore, this model may be recommended for those simulation tests which do not consider effects occurring inside the electronic commutator-motor circuit. However, approximation of PM BLDC motor with dc motor is not recommended in computer tests.

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“…In practice, different solutions are attempted in order to achieve increased rotating speed of brushless motors at decreased torque [1], [2], [3], [4], [5], [6]. One of the methods which make possible PM BLDC motor operation at increased speed and decreased torque is use of electronic commutator with switchable bridgehalf-bridge structure [7], [8].…”

Section: Introductionmentioning

confidence: 99%

“…The properties of PM BLDC motor with electronic commutator and torque-speed curves have been discussed in [7], [8].…”

Section: Introductionmentioning

confidence: 99%

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Efficiency and power losses in PM BLDC motor with variable bridge/half-bridge structure electronic commutator

Krykowski

Bodora

2008

2008 13th International Power Electronics and Motion Control Conference

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In practice we often meet with electrical drives, where it is necessary to operate with higher speed, while load torque is less than rated torque. This type of operation is called "constant power operation" and may be defined as second range of natural motor torque-speed characteristic. In case of motors excited with permanent magnets magnetic flux is constant, and while supply voltage remains constant, motor speed is also (approximately) kept constant. In practice, different solutions are attempted in order to achieve increased rotating speed of brushless motors at decreased torque. One of the methods, which make possible PM BLDC motor operation at increased speed and decreased torque, is use of electronic commutator with switchable bridge-half-bridge structure. The investigation presented in the paper has been aimed at estimation of losses and efficiency in the drive consisting of brushless motor operating with variable structure commutator. Results of theoretical analysis, computer simulations and laboratory tests have shown that application of electronic variable structure commutator, which makes possible operation in the second speed range without increasing motor power and supply source power, causes an insignificant decrease in overall drive efficiency.

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Variable structure bridge/half-bridge electronic commutator for PM BLDC motor supply

Cited by 4 publications

References 1 publication

A reconfigurable structure electronic commutator for a dual BLDC motor EV drive

A reconfigurable structure electronic commutator for a dual BLDC motor EV drive

Constant Current Models of Brushless DC Motor

Efficiency and power losses in PM BLDC motor with variable bridge/half-bridge structure electronic commutator

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