Design Considerations and Selection of Cost-Effective Switched Reluctance Drive for Radiator Cooling Fans

Abstract

Switched reluctance motors (SRMs) are simple in structure, easy to manufacture, magnet-less, brushless, and highly robust compared to other AC motors which makes them a good option for applications that operate in harsh environment. However, the motor has non-linear magnetic characteristics, and it comes with various pole-phase combinations and circuit topologies that causes many difficulties in deciding on which type to choose. In this paper, the viability of SRM as a low-cost, rugged machine for vehicle radiator cooling fan is considered. First, necessary design considerations are presented, then three commonly use types of SRM are analyzed: A 3-phase 6/4, 3-phase 12/8, and a 4-phase 8/6 to find their static and dynamic characteristics so the most suitable type can be selected. Simulation results show that the 8/6 SRM produces the highest efficiency with less phase current which reduces the converter burden. However, with asymmetric half bridge converter, eight power switches are required for 8/6 SRM and thus put a burden on the overall drive cost. As a solution, the Miller converter with only six switches for four phase SRM. To verify the proposed idea, the 8/6 SRM was manufactured and tested. The results show that Miller converter can be used for the proposed SRM with slightly reduced efficiency at 80.4%.

Current Harmonic Suppression of BLDC Motor Utilizing Frequency Adaptive Repetitive Controller

“…In conclusion, the appropriate values of k p and k i for the PIC are 0.08 and 10, respectively. Machines 2022, 10,1071 Therefore, the value of ki should be set to 10. In conclusion, the appropriate val and ki for the PIC are 0.08 and 10, respectively.…”

“…Hence, the rotating synchronous-frame PIC is widely employed instead of the traditional PIC, which can provide the non-static error. However, the computational processes of the rotating synchronous frame are very tedious, which will increase the computational cost of the current loop [8][9][10][11]. In order to suppress the alternating-current harmonics and maintain the simplicity for the current loop, many researchers have attempted to optimize the current loop controller through resonant control theory and model predictive control theory [12][13][14][15][16].…”

Fault-Tolerant Multilevel Converter to Feed a Switched Reluctance Machine

“…For SRM drives, several power electronic converters have been proposed [23]. Many of the applications are based on two-level converters [24][25][26][27][28]. Through the use of these, topologies two voltage levels will be generated, allowing for the magnetization or demagnetization of the machine windings.…”

A Fault Diagnosis Scheme Based on the Normalized Indexes of the Images eccentricity for a Multilevel Converter of a Switched Reluctance Motor Drive

“…In fact, it has been used in an important number of applications. Some examples of these applications can be seen in the areas of the aeronautics, electric vehicles, mining industry, pumping and wind generators [1][2][3][4][5][6][7][8][9]. This option is related with several interesting characteristics like high efficiency, low cost, nonexistence of magnets and high reliability [10].…”