JPH02197296A - Driving device for pulse motor - Google Patents

Abstract

PURPOSE:To reduce the number of printed wiring boards to one by arranging a driving integrated circuit and a control means for feeding pulses to the driving integrated circuit on the printed wiring board. CONSTITUTION:Wiring of a pulse motor 11 is connected with a PC(printed wiring) board 13 at the end section 12 thereof, then it is connected through the PC board 13 with a lead wire 14. A driving IC (integrated circuit) 15 for driving the pulse motor 11 and a control IC 31 as a controlling circuit therefor are arranged on the PC board 13. Since the IC for driving the pulse motor and the control IC therefore are arranged integrally on the PC board for connecting the winding of the pulse motor with the lead wire, the number of the PC board can be reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a pulse motor drive device that drives, for example, a pulse motor.

(Prior Art) In recent years, a pulse motor has been developed in which the ends of the pulse motor windings are supported by a PC (printed wiring) board, and the windings are connected to lead wires or connectors via the PC board. ing.

In a drive device for driving this type of pulse motor, a drive IC (integrated circuit) for driving the pulse motor and a control circuit for controlling it are provided on a PC board different from the above-mentioned PC board. That is, a PC board for driving and controlling the pulse motor is provided separately from a PC board for connecting the windings of the pulse motor and lead wires or connectors. For this reason,
This method requires a plurality of PC boards, making it uneconomical in terms of cost, and it also has the drawback of not being able to be made compact.

(Problems to be Solved by the Invention) As mentioned above, in the conventional device, a PC board for driving and controlling the pulse motor was separately provided, making it uneconomical in terms of cost and compact. The disadvantage was that it was not possible to

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a pulse motor drive device that can be made more compact and lower in cost.

[Structure of the Invention] (Means for Solving the Problems) A pulse motor drive device of the present invention includes a pulse motor that rotates with pulses supplied to a winding, and a pulse motor that rotates with a pulse supplied to a winding. It is composed of a driving integrated circuit that supplies the pulses, a control means for causing the driving integrated circuit to supply the pulses, and a printed wiring board on which the control means and the driving integrated circuit are arranged. .

(Function) This invention uses the above-described means to reduce the number of printed wiring boards to one.
It is designed so that it can be reduced to 1 sheet.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings.

FIGS. 1(a) and 1(b) show a pulse smoke driving device of the present invention. That is, the end portion 12 of the winding of the pulse motor 1 is connected to the PC (printed wiring) board 13.
and is connected to a lead wire 14 via this PC board 13.

Further, on the PC board 13, a drive IC (integrated circuit) 15 for driving the pulse motor 1 and a control IC 31 as a control circuit for controlling the same are disposed. This driving ICl3 is, for example, a bipolar type IC, and is adapted to drive the pulse motor 1 in a bipolar manner. Further, the control IC 31 is capable of slowing up and slowing down the pulse motor]-1, for example.

FIG. 2 shows the configuration of the driving ICl3.

In the case of a bipolar type IC, the number of lead wires can be reduced compared to a unipolar type IC, and the entire drive coils 2], a, and 21b can be used efficiently. That is, when an A-phase excitation signal is supplied to the terminal 150a, the high level of this excitation signal turns on the transistors 151 and 152, and current 1a flows through the drive coil 21a in the direction shown by the arrow in the figure. Also, terminal 15
When the A-phase excitation signal is supplied to 0b, the high level of this excitation signal turns on transistors 153 and 154, and a current of 1 is applied to the drive coil 21a in the direction indicated by the arrow in the figure.
a flows. Further, when a B-phase excitation signal is supplied to the terminal 150c, the high level of this excitation signal turns on transistors 155 and 156, and the drive coil 21b
Current Ib flows in the direction indicated by the arrow in the figure. Furthermore, when a B-phase excitation signal is supplied to the terminal 150d, the high level of this excitation signal causes the transistors 1.57, 1.5
8 is turned on, and current 1b flows through drive coil 21b in the direction indicated by the arrow in the figure. In addition, 22 is the rotor of the pulse motor 11, and 159... are the respective transistors 1.
This is a diode for protecting 51 to 158.

In this manner, bipolar drive allows a large output to be obtained, and the pulse motor 11 can also be used as a linear motor.

FIG. 3 shows the configuration of the control IC 31.

This control IC 31 includes a control voltage generation section 32 that generates a voltage according to the speed when the pulse motor 11 is accelerated, constant speed, and decelerated;
a voltage controlled oscillation section 33 that generates a pulse signal of a frequency according to the output of the voltage controlled oscillation section 33; and the respective phases A and B according to the output of this voltage controlled oscillation section 33.

The excitation signal output section 34 outputs a four-pole, four-phase excitation signal to be supplied to A and B.

For example, when the pulse motor 11 is used to drive a registration roller of a copying machine, the control voltage generation section 32 includes a relay circuit 32a that is switched in response to a selection signal from a main control section (not shown) of the copying machine. The resistance R1 is selected during acceleration operation, and the resistance R2 is selected during deceleration operation. During acceleration and constant speed operation, the resistance R is adjusted according to the acceleration.
During deceleration operation, a voltage determined by resistor R2 and capacitor C is generated depending on the deceleration. In this case, the time constants of the capacitor C and the resistors R, R2 are set in advance so that the rotational speed (PPS) of the pulse motor 11 outputs a voltage such that the rotational speed (PPS) depicts an acceleration/deceleration curve as shown in FIG. has been done.

The voltage controlled oscillator 33 includes a voltage controlled oscillator circuit (VCO) 33 that converts the voltage from the control voltage generator 32 into a frequency.
It is mainly composed of a.

The excitation signal output section 34 uses the output of the voltage controlled oscillation section 3B as a clock (CLK), and shifts a (CW/CCW) switching signal from a main control section (not shown) instructing the forward/reverse rotation direction. The main component is a shift register 34a that outputs signals.

In this way, by configuring the control IC 31 to enable slow-up and slow-down operation of the pulse motor 11, it is possible to change speeds over a wide range from very low speeds, and for example, to smoothly start and slow down the registration rollers. be able to stop. Furthermore, since the control circuit itself can be made smaller by using an IC, it can be mounted on the PC board 13.

Figure 5 shows the main body frames 1, 1 a of the pulse motor 1.
An example is shown in which the support portion 16 is formed in the structure. In this case, for example, the PC board
Fix with screws 17. This makes it possible to stably attach the PC board 13 to a part of the main body frame 11a.

6(a) and (b) show an example of a case where a support portion 18 is formed on the main body frame lla of the pulse motor 11, and this support portion 18 is also used as a heat sink for the drive ICl 3. . That is, the supporting part 18 is formed to have approximately the same size as the driving ICl3, and the driving ICl3 is held by the supporting part 18, and the driving IC is held against the supporting part 18, for example.
The PC board 13 is fixed with screws 19°19 via l3. As a result, as in the case of FIG. 5, the PC board 13 can be stably mounted, and the drive ICl3
It becomes possible to improve the heat dissipation effect of.

As mentioned above, by integrally arranging the drive IC for driving the pulse motor and the control IC for controlling it on the PC board for forming the windings and lead wires of the pulse motor, The number of PC boards can be reduced. In other words, there is no need for a dedicated PC board on which drive ICs and control ICs are installed in conventional devices, and a single PC board is used to connect the pulse motor windings and lead wires, as well as to connect the drive IC.
Since it is possible to arrange C and a control IC, it is possible to achieve downsizing and cost reduction.

Shikamo's simple configuration allows for stable attachment of the PC board to the pulse motor. Further, by substituting a part of the main body frame of the pulse motor as a heat sink for the drive IC, the heat dissipation effect of the drive IC can be improved.

Further, by using a bipolar drive IC and bipolar drive of the pulse motor, a large output can be easily obtained and the motor can be used as a synchro motor.

Furthermore, by allowing the control IC to slow up and slow down the pulse motor, smooth speed changes over a wide range from very low speeds are possible.

It should be noted that the present invention is not limited to the above-mentioned embodiments, and it goes without saying that various modifications can be made without departing from the gist of the invention.

[Effects of the Invention] As described in detail above, according to the present invention, it is possible to provide a pulse motor drive device that can be made more compact and lower in cost.

[BRIEF DESCRIPTION OF THE DRAWINGS] The drawings show one embodiment of the present invention, and FIG. 1 is a block diagram schematically showing a pulse motor drive device, and FIG. 2 is a block diagram showing one configuration of a drive IC. Figure 3 shows the control I
FIG. 4 is a diagram showing the acceleration/deceleration control of a pulse motor, and FIGS. 5 and 6 are diagrams showing a pulse motor according to other embodiments of the present invention. FIG. 2 is a schematic configuration diagram of a drive device of FIG. 11...Pulse motor, 11a...Body frame (
pulse motor body), 13...PC board (printed wiring board),
14... Lead wire, 15... Drive IC (driving integrated circuit), 31... Control IC (control circuit). Applicant's agent Patent attorney Takehiko Suzue] 2

Claims (5)

[Claims] (1) A pulse motor that rotates with pulses supplied to its windings, a driving integrated circuit that supplies the pulses to the windings of this pulse motor, and a control means that causes the driving integrated circuit to supply the pulses. A pulse motor drive device comprising: a printed wiring board on which the control means and the drive integrated circuit are disposed. (2) The pulse motor driving device according to claim 1, wherein the driving integrated circuit is a bipolar integrated circuit. (3) The pulse motor drive device according to claim 1, wherein the control circuit is capable of slowing up and slowing down the pulse motor. (4) A pulse motor that rotates with pulses supplied to the windings; a driving integrated circuit that supplies the pulses to the windings of the pulse motor; and a control means for supplying the pulses to the driving integrated circuit. A pulse motor drive device, comprising: a printed wiring board on which the control means and the driving integrated circuit are disposed, and the printed wiring board is fixedly disposed on the pulse motor. (5) a pulse motor that rotates with pulses supplied to its windings; a driving integrated circuit that supplies the pulses to the windings of the pulse motor; and a control means for supplying the pulses to the driving integrated circuit. a printed wiring board on which the control means and the driving integrated circuit are disposed and fixedly disposed on the pulse motor; a printed wiring board provided between the printed wiring board and the pulse motor;
A pulse motor drive device, comprising: a support portion having a heat dissipation function; and a drive device for a pulse motor.