Brushless Permanent Magnet Motor Design- P7 docx

... 68 Magnetic circuit concepts, 14 Magnet fraction, 66, 141 Magnet leakage factor, 67, 142 Magnet leakage flux, 66 Magnet shaping, 120 Magnetomotive force (mmf), definition of, 16 Motor ... you need to know to design tomorrow's most popular motor today! Brushless permanent- magnet motors are increasingly the motor of choice in a wide range of applications, from...

Ngày tải lên: 02/07/2014, 08:20

... or fractional pitch motor as opposed to integral slot or integral pitch motor. Figure 5.4 illustrates this concept for three-phase motors having four magnet poles. The motor cross sec- tion ... radial arc magnet and the analysis conducted in Chap. 4 is directly applied. Brushless Motor Operation Mutual Inductance The mutual inductances between the phases of a brushless...

Ngày tải lên: 02/07/2014, 08:20

... rotational brushless per- manent -magnet (PM) motors. Brushless dc, PM synchronous, and PM step motors are all brushless permanent- magnet motors. These specific motor types evolved over time to ... to better engineered motor systems. Why a book on brushless permanent- magnet motor design? This book is motivated by the ever increasing use of brushless permanent- m...

Ngày tải lên: 02/07/2014, 08:20

... gaps, and slotted magnetic structures were developed. The properties of ferromagnetic and per- manent -magnet materials were discussed. A magnetic circuit model of a permanent magnet was introduced ... for brushless PM motor design. Energy and Coenergy The energy stored in a magnetic field is an important quantity to know in the design and analysis of brushless PM moto...

Ngày tải lên: 02/07/2014, 08:20

... there are motors themselves. Given the body of information provided in this chapter and Chap. 4, it is possible to develop equations for the design of brushless permanent- magnet motors. 128 ... surface-mounted magnet rotor, it is not pos- sible to use rectangular-shaped magnets; at least one surface must be arced; (2) if the motor is to operate at high speeds, some means of...

Ngày tải lên: 02/07/2014, 08:20

... in low-power, lower-perfor- mance motors. The sine wave motor The sine wave back emf motor completes the discussion of three-phase motors. A three-phase motor with sinusoidal back emf ... Y-connected three-phase motor. for the six-step driven three-phase motor. Compared with the three- phase-ON case, the rms phase current is approximately 22 percent larger and the ohmic mo...

Ngày tải lên: 02/07/2014, 08:20

Ngày tải lên: 25/12/2013, 23:18

... magnet motor. The maximum values of the demagnetizing coefficient are about 0.8. In some cases, the permanent magnet is demagnetized irreversibly by the flux-weakening control. VI. DEMAGNETIZATION ... FOR PERMANENT MA( 4) The control method considering the demagnetization- limit is analyzed. If the permanent magnet has a straight de- magnetization curve, as does a rar...

Ngày tải lên: 08/03/2014, 22:01

... building. Examples from The Legend of Zelda: The Windwaker and Super Monkey Ball 2 illustrated ways design- ers can make use of these effects in character designs. Chapter 6 continues this overview

Ngày tải lên: 02/07/2014, 05:20

Ngày tải lên: 03/01/2014, 19:50