Fan driven by capacitor motors and method for adjusting motor capacitance and turns
A technology of motor drive and adjustment method, which is applied in the direction of machines/engines, electromechanical devices, asynchronous induction motors, etc., and can solve the problems of easy disconnection, complex electromagnetic calculation of capacitor motors, and time-consuming winding.
Active Publication Date: 2014-07-02
江门市金羚排气扇制造有限公司
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Problems solved by technology
The problem is that when the power of the fan is relatively small and the rated voltage is high, the number of turns of the motor winding is too large and the wire diameter is too small, which takes time and is prone to wire breakage during production.
At the same time, the electromagnetic calculation of the fan capacitor motor is more complicated
Method used
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Embodiment Construction
[0024] The embodiment of the present invention is improved on the basis of the common capacitive motor driven ventilation fan in the prior art. The basic structure of the ventilation fan is as follows: Figure 5 As shown, it mainly includes an impeller 1 and a motor 10; the impeller is injection molded, with a diameter of 75mm; the motor 10 is an inner rotor motor, including a stator 3 and a squirrel cage rotor 4. Stator core punching sheet such as figure 1 It is square and rounded, with 8 slots with uniform opening and flat bottom (it can also be heterosexual slots, closed slots and round bottom slots), 4 of the 8 teeth are located on the symmetry axis of the 4 straight line segments, and the other 4 teeth are located on the 4 corner arcs The axis of symmetry of the segment, each tooth is wound around a coil element 6 with an insulating frame. The foregoing is the design inherited from the prior art by the embodiment of the present invention. The improved design of the ven...
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Disclosed is a fan driven by capacitor motors. Motors directly drive an impeller which is molded in an injection manner, and the diameter of the impeller is not larger than 300mm. Each motor comprises a stator, a rotor and a capacitor, a main-phase winding and an auxiliary-phase winding are distributed on an iron core of the stator according to the required space angle difference, and the auxiliary-phase winding is serially connected with the main-phase winding to be connected with a power supply after being connected with the capacitor in parallel. A method for adjusting motor capacitance and turns includes the following steps of 1) manufacturing two-phase winding model motors, keeping the space electric angle difference of the windings of two phases on the iron core of the stator by 90 degrees so that the motors can run symmetrically at a rated working point, setting effective turns of the winding of one phase as Wm'and the connected power supply voltage as Um, and measuring the conductance g and electric susceptance b of a loop of the phase; 2) computing the effective turns of the main phase Wm', the effective turns Wa'of the auxiliary phase and the capacitance C'of the model motors by the following formula: Wm'=Wm UN / (Um(1+(g / b)2)0.5); Wa'=Wm (g / b) UN / (Um(1+(g / b)2)0.5); C'=(b+b3 / g2) / (2 pai f UN2 / (Um2(1+(g / b)2))), wherein the UN relates to the rated voltage of the model motors and the f relates to the rated frequency of the model motors. Compared with the conventional art, the design has the advantages that winding process is improved, computing load is reduced and better performance is realized.
Description
technical field [0001] The invention relates to a fan driven by a capacitor motor and a method for adjusting the capacitance and turns of the motor. In the international patent classification table, the classification belongs to F04D25 / 08, H02K3 / 28, H02K17 / 08 or H02K19 / 04. Background technique [0002] The fan driven by the capacitor motor of the traditional technology is to arrange the main phase winding and the secondary phase winding according to the specified spatial angle difference in the stator core of the motor, and connect the secondary phase winding to the power supply in parallel with the primary phase winding after the capacitor is connected in series (parallel capacitor motor for short). , the inductance characteristics of the main phase winding make the current of the main phase winding lag behind the power supply voltage, and the characteristics of the series capacitor of the secondary phase winding make the current of the secondary phase winding lead the power...
Claims
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IPC IPC(8): F04D25/08H02K17/08
Inventor 区长钊潘海辉
Owner 江门市金羚排气扇制造有限公司