Automatic double-speed control motor after secondary electrification

[0012] The automatic two-speed control motor after the secondary power-on of the present invention is as follows: figure 1 and figure 2 As shown, it includes: motor excitation soft coil (1), motor excitation hard coil (2), brush (3), motor rotor (4), control box (5), reverse contactor copper strip (51), Conjoined copper strip (52), positive contactor copper strip (53), directional relay (54), secondary reverse controller (55), control relay (56), control connector (57), waterproof pull-out Take off (58), overtravel spring (59), moving contact (60), breaking spring (61), diode (62), pull-in coil (63), holding coil (64) and coil keel, iron bars and iron core. The automatic two-speed control motor after the second power-on is applied to the hydraulic unit of the car electric winch and the electric stacker. The motor excitation soft coil (1) is composed of multiple enameled thin wires and arranged symmetrically on the left and right, because the enameled thin wires Small area, large number of strands, large resistance, and small current when working in parallel. Industrialized batch-manufactured directional relays (54), secondary inversion controllers (55) and control relays (56) can be used to achieve control. The directional relay (54), the secondary reversing controller (55), and the control relay (56) are installed in the space below the cable at the exit (58), which fully utilizes each space in the control box (5) and reduces the Volume, reduce cost, and facilitate the installation and use of the product, the motor excitation hard coil (2) is composed of a small number of thick copper wires and is arranged symmetrically up and down, the control box (5), the control connector (57), the direction relay (54) , the secondary reverse controller (55), the control relay (56) and the forward contactor copper strip (53) conduct the motor excitation hard coil (2), the brush (3) and the motor rotor (4) in series and connect the motor The excitation soft coil (1) is connected in parallel in the forward direction. At this time, the magnetic field of the motor is jointly generated by the excitation hard coil (2) and the motor excitation soft coil (1). Or lifting action, after the secondary power-on operation within a limited time, no additional switch is required, and the secondary inversion controller (55) applies the characteristics of the capacitor charging and discharging that takes time and the difference between the starting voltage and the release voltage of the control relay (56). , automatically reverse the first function of the secondary reverse control relay (56), there are two reverse function modes: one mode is that if the first control relay (56) is turned on, the second time is not The other mode is that if the control relay (56) is not conducting for the first time, it is conducting for the second time. Under this control, the motor excitation soft coil (1) does not participate in the work, and the forward contactor The copper strip (53) only conducts the motor excitation hard coil (2), the brush (3) and the motor rotor (4) in series, the magnetomotive force is small, realizes the forward fast rotation, controls the connector (57), reverse contact The copper strip (51), the directional relay (54) and the control relay (56) conduct the brush (3) and the motor rotor (4), and reversely conduct the motor excitation hard coil (2) and then reversely connect to the motor The excitation soft coil (1) works in parallel, and the motor rotates in the reverse direction to achieve fast light-load speed and heavy-load torque and reverse rotation. The reverse working current of the motor is small, and the wire diameter of the reverse wire can be small. Corresponding control wires can be accommodated in the wire and cable, and are connected to the motor after being outputted from the same waterproof pull-out (58).

[0013] as attached figure 2 In the control box (5) shown, various bosses of different lengths protrude from different positions, the reverse contactor copper strip (51), the conjoined copper strip (52), the forward contactor copper strip (53), the super The process spring (59), the moving contact (60), the breaking spring (61), the diode (62), the pull-in coil (63), the holding coil (64) and the iron core, the coil keel and the iron bar form a conjoined counter. The forward contactor and the forward contactor take power together on the conjoined copper bar (52), and one end of the pull-in coil (63) is connected to its corresponding reverse contactor copper bar (51) through the isolated diode (62) Or on the copper strip (53) of the positive contactor, after the contactor is energized, short-circuit the pull-in coil (63) to make it disconnected from the energization, no power consumption is generated, and no heat is generated. At this time, only the coil (64) is kept energized, and the power consumption is To ensure the normal operation of the contactor, the reverse contactor copper strip (51), the forward contactor copper strip (53), the conjoined copper strip (52) and the moving contact (60) are fully used in the control box (5) The protruding bosses are positioned, pressed and limited to ensure that the moving contacts (60) are spaced apart and dissipated. Waterproof outgoing cables, because the normally open or normally closed circuit controlled by the conjoined contactor and the control box (5) are made of engineering plastics, and the overtravel spring (59), the moving contact (60) and the breaking spring (61) are in direct contact with each other. , The coil keel is made of reinforced nylon material, which has self-lubricating properties, and the frequency of use of the automotive electric winch and the hydraulic unit of the electric stacker is not high. The iron core is in direct contact with the coil keel and the bottom iron bar. Each wire is integrally connected on a circuit board and fixed in the box, the structure is simplified, and the manufacturability is good.

[0014] The automatic two-speed control motor after secondary power-on of the present invention fully and specifically analyzes the working characteristics of the forward and reverse rotation of the motor, and develops a conjoined contactor and its control system in a targeted manner, which is small in size, low in cost and good in performance. Strong practicality.