Stepping motor having positive, negative or zero potential applied to points of delta connected stator winding
阅读：438发布：2022-01-01
专利汇可以提供Stepping motor having positive, negative or zero potential applied to points of delta connected stator winding专利检索，专利查询，专利分析的服务。并且An electrical stepping motor having a two-pole permanent magnet rotor and a stator winding connected in a delta. The rotary field for the stator is produced by an electronic circuit which simultaneously applies either a positive, a negative or a zero potential signal to the three corners or inputs of the delta winding in a predetermined sequence whereby 12 steps per revolution are achieved.，下面是Stepping motor having positive, negative or zero potential applied to points of delta connected stator winding专利的具体信息内容。
1. An electric stepping motor arrangement comprising: a motor having a stator with a three-phase delta-connected stator winding, and a permanent magnet rotor; and a rotary field generating means coupled to said stator winding for simultaneously applying to each of the three input points of said stator winding a timed predetermiNed sequence or pulses having positive, negative and zero voltage potentials so that predetermined combinations of positive, negative and zero potentials are sequentially applied to the stator winding, whereby a stepped rotating field is produced, said rotary field generating means including: a shift register connected to function as a ring counter and having three storage positions each with two outputs, each storage position of said shift register being connected to one of the input points of said stator winding via a logic circuit arrangement; a clock pulse generator the output pulses of which are coupled to said shift register to cause the shifting of the stored information after each clock pulse period, each of the said output pulses from said clock pulse generator having a duration equal to one half of a clock period; and means, containing said logic circuit arrangement, responsive to the six output signals from said shift register and to said clock pulses for producing at each input point of said stator winding a train of pulses comprised of alternating positive and negative potential pulses each of which is five half clock periods in duration and each pair of which is separated by a zero potential pulse which is one half clock period in duration, said pulse trains being shifted in phase with respect to one another in such a manner that a total of twelve different potential combinations are produced at the three input points of the stator winding, resulting in twelve steps for the motor for each revolution of the rotor.
2. An electric stepping motor arrangement as defined in claim 1 wherein said means responsive to the six output signals from said shift register comprises three pairs of evaluation channels with each evaluation channel including a portion of said logic circuit arrangement and a power amplifier; one evaluation channel of each pair of channels being connected to an output of one storage position of said shift register and to an output of the following storage position, and the other evaluation channel of each pair being connected to the other outputs of said one and said following storage positions; one evaluation channel of each pair being responsive to the signals from the respectively connected outputs of said storage position to produce an output pulse train having a positive potential for five half clock periods followed by a zero potential for seven half clock periods, and the other evaluation channel of each pair being responsive to the signals from the respectively connected outputs to produce an output pulse train having a negative potential for five half clock periods followed by a zero potential for seven half clock periods; and means connecting the outputs of the evaluation channels of a pair of channels together and to one of the said inputs of said stator winding.
3. An electric stepping motor arrangement as defined in claim 2 wherein a first of said pairs of evaluation channels is connected to the outputs of the first and second of said three storage positions, a second of said pairs of evaluation channels is connected to the outputs of said second and third of said three storage positions and the third of said pairs of evaluation channels is connected to the outputs of said third and first of said three storage positions; one evaluation channel of each of said first and second pairs of channels being connected to the L output of one storage position of said shift register and to the 0 output of the following storage position, and the other evaluation channel of each of said first and second pairs being connected to the 0 output of said one storage position and the L output of said following storage position; and, one evaluation channel of said third pair of evaluation channels being connected to the L outputs and the other evaluation channel of said third pair being connected to the 0 outputs of both said third and first storage positions.
4. An electric stepping motor arrangement as defined in claim 2 wherein Each evaluation channel includes a pair of logic gates, the output signal of said one storage position and said clock pulse signal being applied as the input signals to a first of said gates, and the output signal of said first gate and the output signal from the said following storage position being applied as the input signals to the second of said gates.
5. An electric stepping motor arrangement as defined in claim 4 wherein said logic gates are NOR gates.
6. An electric stepping motor arrangement as defined in claim 4 wherein each of said second gates has its output connected to the power amplifier of the corresponding evaluation channel, the power amplifier of one evaluation channel of each pair being responsive to the output signal from the corresponding one of said second gates to apply a positive or a zero potential to the input point of said stator winding connected thereto, and the power amplifier of the other evaluation channel of each pair being responsive to the output signal from the corresponding one of said second gates to apply a negative or a zero potential to the input point of the stator winding connected thereto.
7. An electric stepping motor arrangement as defined in claim 2 wherein each of said evaluation channels includes a pair of NOR logic gates, the output signal of said one storage position and said clock pulse signal being applied as the input signals to a first of said gates and the output signal of said first gate and the output signal of said following storage position being applied as the input signals to the second of said gates, the outputs of said second gates being connected to the corresponding power amplifier in said evaluation channels; one power amplifier of each pair of evaluation channels emitting a positive potential pulse of five half pulse duration when actuated by the output signal from the corresponding second gate, and the other power amplifier of each pair of evaluation channels emitting a negative potential pulse of five half clock period duration when actuated by the output signal from the corresponding second gate.
8. An electric stepping motor arrangement as defined in claim 7 wherein said shift register is comprised of three clock pulse controlled flip-flops, the L output of the first and second flip-flops being connected to the control input of the subsequent flip-flop, and the 0 output of the third flip-flop being connected to the control input of the first flip-flop.
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