JP2020103036A - Motor built-in roller - Google Patents

Abstract

To develop a motor built-in roller and a controller for the motor built-in roller that require fewer wires than before.SOLUTION: A motor built-in roller includes a cylindrical roller body, inside which a motor 12 and a reducer are built. A voltage signal forming circuit 56 is built in the roller body. The voltage signal forming circuit 56 includes magnetic pole corresponding switching elements Q1, Q2, and Q3 which are turned on/off according to the outputs from magnetic pole detection means H1, H2, and H3, and a temperature corresponding switching element Q4 which is turned on/off according to the output from abnormal temperature detection means 57, and a plurality of resistors R1 to R7, and generates a voltage according to the detection status of the magnetic pole detection means H1, H2, and H3 and the detection status of the abnormal temperature detection means 57.SELECTED DRAWING: Figure 5

Description

The present invention relates to a motorized roller, and more particularly to a motorized roller that incorporates a brushless motor. The present invention also relates to a controller that controls a roller with a built-in motor. The present invention also relates to a motorized roller system in which a motorized roller and a controller are combined. The present invention also relates to a geared motor.

A roller with a built-in motor is known as a component such as a roller conveyor device. The roller with a built-in motor has a motor and a speed reducer built into the roller body, and drives the internal motor to rotate the outer roller body.
The roller with a built-in motor is driven by receiving power supply from a controller provided outside the roller body.

The roller with a built-in motor disclosed in Patent Document 1 employs a brushless motor as a built-in motor. The brushless motor disclosed in Patent Document 1 includes a stator configured by winding a wire around an iron core, a rotor having magnetic poles, and a Hall IC.
The brushless motor disclosed in Patent Document 1 is a three-phase, four-pole brushless motor, and the stator is composed of windings of three systems. Further, in Patent Document 1, three Hall ICs are provided according to the number of windings.
The detection signals of the three Hall ICs are taken out of the roller main body through signal lines and input to the controller described above.
The controller has a drive circuit that supplies power to the windings. The drive circuit of the controller and the winding inside the roller body are connected by a power line.

In the roller with a built-in motor disclosed in Patent Document 1, the rotation position of the rotor is detected by the Hall IC, and this detection signal is input to the external controller through the signal line.
The controller switches the drive circuit according to the detection signal of the Hall IC, sequentially supplies electric power to the winding of the stator, forms a rotating magnetic field, and maintains the rotation of the rotor.

JP, 2007-68393, A

The roller with a built-in motor is driven by being connected to an external controller as described above. However, the roller system with a built-in motor of the prior art has the number of lines connecting the roller with a built-in motor and the controller (the total of the signal line and the power line). There was a lot of complaints.
For example, the roller with a built-in motor disclosed in Patent Document 1 requires nine lines connecting the roller with a built-in motor and the controller.
That is, in the roller with a built-in motor disclosed in Patent Document 1, three Hall ICs are built in, and the signals of each Hall IC are input to the controller by individual signal lines. I need a line.
Further, in the roller with a built-in motor disclosed in Patent Document 1, the stator is composed of windings of three systems, and since it is necessary to supply power to each winding, three wires are required as power lines.

Further, two power supply lines (two positive and negative lines) for driving the Hall IC and a signal line for detecting an abnormal temperature rise inside when an overcurrent flows are required.
Therefore, the roller with a built-in motor disclosed in Patent Document 1 requires three Hall IC signal lines, three power lines, and three other lines, for a total of nine lines. Therefore, in the roller with a built-in motor according to the conventional technique, the bundle of electric wires has to be thick, and it is difficult to route the electric wires such as passing the bundle of electric wires through the hole of the conveyor frame.
In addition, when assembling the roller with a built-in motor, there are many places for connecting electric wires such as soldering, and the assembly is troublesome.

Therefore, the present invention focuses on the above-mentioned problems of the prior art, and an object thereof is to develop a roller with a built-in motor and a controller for a roller with a built-in motor that require a smaller number of electric wires than the conventional one. Another object of the present invention is to develop a roller system with a built-in motor in which the number of lines connecting the roller with a built-in motor and the controller is small.

According to an aspect for solving the above-mentioned problems, in a roller with a built-in motor, in which at least a motor is built in the roller main body, and the rotational force of the motor is transmitted to the roller main body to rotate the roller main body, electric power and signal are supplied to the inside and outside of the roller main body. The motor has an input/output unit for inputting/outputting, and the motor has a stator constituted by a plurality of windings, a rotor, and a plurality of magnetic pole detecting means, and the roller is arranged in accordance with the rotational position of the rotor. A brushless motor that switches the windings to which power is supplied outside the main body, and a magnetic pole corresponding switching element that turns on and off in accordance with the output from at least the magnetic pole detection means in the roller main body, and a voltage composed of a plurality of resistors. A signal forming circuit is built in, and the combined resistance of the voltage signal forming circuit has different resistance values depending on the combination of the magnetic pole detecting means detecting the magnetic poles, and the voltage signal forming circuit changes the voltage different depending on the combination of the magnetic pole detecting means detecting the magnetic poles. Is output to the input/output unit.

In the roller with a built-in motor of this aspect, the voltage signal forming circuit is built in the roller body. The voltage signal forming circuit outputs different voltages to the input/output unit depending on the combination of the magnetic pole detecting means that detects the magnetic pole. Therefore, by analyzing the voltage signal on the controller side, it is possible to know which magnetic pole detection means has detected the magnetic pole, and it is possible to appropriately select the winding to which power is to be supplied. Further, according to the present aspect, since the information indicating which magnetic pole detecting means has detected the magnetic pole depending on the magnitude of the voltage is transmitted to the controller side, one signal line is sufficient. Therefore, the number of lines connecting the motorized roller and the controller is smaller than in the past.
Further, since the inside of the roller body is a closed space, and the stator generates heat due to energization, the temperature inside the roller body rises and falls.
Although the current flowing through each part changes due to the internal temperature change, the voltage is not easily affected by the temperature change.
In this aspect, paying attention to this point, the detection status of the magnetic pole detection means is converted into a voltage change and output to the output section. Therefore, according to this aspect, the detection status of the magnetic pole detection means is rarely erroneously detected.

In the above-described aspect, the abnormal temperature detecting means for detecting an abnormally high temperature and the temperature-corresponding switching element which is turned on/off according to the output from the abnormal temperature detecting means are incorporated in the voltage signal forming circuit, and the abnormal temperature detecting means is abnormal. When a high temperature is detected, it is desirable that the combined resistance of the voltage signal forming circuit be in a resistance value region different from usual.

In the roller with a built-in motor according to this aspect, a circuit for detecting an abnormal temperature is also incorporated in the voltage signal forming circuit. Therefore, in addition to the information indicating which magnetic pole detecting means detects the magnetic pole, the information detected by the abnormal temperature detecting means can be transmitted to the controller side through one signal line.

In the above-described aspect, the input/output unit has a plurality of power supply lines for supplying power to the respective windings, and the magnetic pole detection means is a Hall IC and includes a power supply voltage input unit, a signal voltage output unit, and a ground unit. It is preferable that the ground portions of the respective magnetic pole detecting means are connected to each other and are also connected to a plurality of power supply lines via rectifiers.

The roller with a built-in motor of this aspect has a plurality of power supply lines for supplying power to each winding. Here, since the brushless motor sequentially supplies electric power to the plurality of windings, the plurality of power supply lines sequentially become the positive electrode side and the negative electrode (ground) side in order. Therefore, at least one of the plurality of power supply lines has a timing on the negative electrode (ground) side.
In this aspect, the ground portions of the magnetic pole detection means are connected to each other and are connected to the plurality of power supply lines via the respective rectifiers, so that the ground portion is connected via any rectifier at all times. Is connected to the negative electrode (ground) side, and each magnetic pole detecting means is energized.

In the above aspect, the voltage signal forming circuit is preferably a ladder type resistance circuit or a part of the ladder type resistance circuit.

In the above-mentioned aspect, there are a plurality of the magnetic pole corresponding switching elements, the plurality of resistances include a first resistance and a second resistance, and the magnetic pole corresponding switching elements have the same or different resistance values. Are connected in series, each magnetic pole corresponding switching element and a first resistor corresponding to the magnetic pole corresponding switching element constitute a magnetic pole corresponding switching section, and the magnetic pole corresponding switching sections are connected in parallel. Therefore, it is desirable that at least one second resistor is provided in at least one of the magnetic pole corresponding switching units.

In the above-mentioned aspect, it is desirable that the resistance value of the second resistor is smaller than the resistance value of each of the first resistors.

In the aspect described above, it is desirable that the resistance values of the first resistors be different.

In the above-described aspect, the abnormal temperature detecting means for detecting an abnormally high temperature and the temperature-corresponding switching element which is turned on/off according to the output from the abnormal temperature detecting means are incorporated in the voltage signal forming circuit, and the abnormal temperature detecting means is abnormal. When a high temperature is detected, the combined resistance of the voltage signal forming circuit becomes a resistance value region different from the normal value, the plurality of resistances further include a third resistance, and the third resistance is connected in series to the temperature corresponding switching element. The temperature-corresponding switching element and the third resistor constitute a temperature-corresponding switching unit, and the temperature-corresponding switching unit is connected in parallel with each of the magnetic pole-corresponding switching units, and It is desirable that the resistance value be smaller than the resistance value of the first resistor and the resistance value of the second resistor.

According to another aspect of the present invention, in a controller for a roller with a built-in motor which is outside the roller body and supplies power to a motor inside the roller body, the windings to be supplied with power are switched while supplying the power to the windings. And a voltage signal analyzing unit, the voltage signal analyzing unit controls the driving circuit in accordance with the input voltage signal, and selects a winding for supplying electric power. Is a controller for.

The controller for a roller with a built-in motor according to this aspect has a voltage signal analysis unit, controls the drive circuit in accordance with the input voltage signal, and selects a winding to supply power.

According to another aspect of the present invention, in a roller system with a built-in motor configured by a roller with a built-in motor and a controller, the roller with a built-in motor has at least a motor built in the roller body, and the rotational force of the motor is transmitted to the roller body. The motor built-in roller has an input/output unit for inputting and outputting electric power and signals inside and outside the roller main body, and the motor has a stator composed of a plurality of windings. A brushless motor that has a rotor and a plurality of magnetic pole detection means, and switches windings that supply electric power outside the roller body according to the rotational position of the rotor. At least a magnetic pole corresponding switching element which is turned on/off according to the output from the magnetic pole detection means and a voltage signal forming circuit composed of a plurality of resistors are built in, and the combined resistance of the voltage signal forming circuit is a magnetic pole detection detecting the magnetic pole. The resistance value varies depending on the combination of the means, and the voltage signal forming circuit outputs different voltage to the input/output unit depending on the combination of the magnetic pole detecting means detecting the magnetic pole, and the controller is outside the roller main body and inside the roller main body. For supplying electric power to the motor, and has a switching circuit for switching windings to be supplied with electric power, and a voltage signal analysis means, and the voltage signal analysis means is a switching circuit according to an input voltage signal. It is a roller system with a built-in motor, which is characterized by controlling a coil and selecting a winding for supplying electric power.

According to this aspect, the number of lines connecting the motor built-in roller and the controller can be reduced as compared with the conventional case.

In the above-mentioned aspect, it is desirable to select a winding for supplying electric power by inputting different voltages to the voltage signal analyzing means depending on the combination of the magnetic pole detecting means detecting the magnetic poles from the voltage signal forming circuit.

According to another aspect of the present invention, in a geared motor in which a motor and a speed reducer are incorporated in a housing, and the rotational force of the motor is reduced by the speed reducer and output, an input/output for inputting and outputting electric power and signals to/from the housing is provided. The motor has an output section, the motor has a stator composed of a plurality of windings, a rotor, and a plurality of magnetic pole detection means, and an electric power is supplied to the outside of the housing according to the rotational position of the rotor. Is a geared motor for switching the winding to be supplied, the magnetic pole corresponding switching element that is turned on and off at least in accordance with the output from the magnetic pole detection means, and a voltage signal forming circuit configured by a plurality of resistors is built-in. The combined resistance of the voltage signal forming circuit has different resistance values depending on the combination of the magnetic pole detecting means detecting the magnetic poles, and the voltage signal forming circuit outputs different voltages to the input/output unit depending on the combination of the magnetic pole detecting means detecting the magnetic poles. The geared motor is characterized by

The roller with a built-in motor of the present invention has a smaller number of wires for connecting to the controller than the conventional one. Therefore, there is little time and effort required when assembling the motorized roller itself and assembling the motorized roller into a conveyor device or the like.
The same applies to the geared motor of the present invention.
Further, the roller with a built-in motor, the controller for the roller with a built-in motor, and the roller system with a built-in motor according to the present invention have an effect of reducing the number of lines connecting the roller with a built-in motor and the controller.

FIG. 3 is a front view of the motorized roller and the motorized roller controller according to the embodiment of the present invention. It is sectional drawing of the motor built-in roller of FIG. It is a disassembled perspective view of the motor built-in roller of FIG. It is sectional drawing of the motor unit built in the roller with a built-in motor of FIG. FIG. 2 is a circuit diagram of the motorized roller shown in FIG. 1. It is a part of circuit diagram of the roller with a built-in motor of FIG. 1, and is a circuit diagram of the electric power feeding part to a Hall IC. It is a circuit diagram of the controller for rollers with a built-in motor of FIG. 6 is a graph showing the relationship between the detection status of the Hall IC in the motor-incorporated roller of FIG. 1 and the voltage output from the voltage signal forming circuit. It is a circuit diagram of a roller with a built-in motor of other embodiments of the present invention. It is a front view of the geared motor of the embodiment of the present invention. It is a top view of the geared motor of the embodiment of the present invention. It is sectional drawing of the geared motor of embodiment of this invention. FIG. 6 is a circuit diagram of a motorized roller according to another embodiment of the present invention. FIG. 6 is a circuit diagram of a motorized roller according to another embodiment of the present invention. It is a circuit diagram of a controller for rollers with a built-in motor concerning other embodiments of the present invention. FIG. 6 is a circuit diagram of a motorized roller according to another embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described. The roller system 100 with a built-in motor of the present invention includes a roller 3 with a built-in motor and a controller for a roller with a built-in motor (hereinafter, controller) 50.
The motor built-in roller 3 and the controller 50 of the present embodiment are characterized by internal circuits, but prior to description thereof, their basic structures will be described.

FIG. 1 shows a roller 3 with a built-in motor according to an embodiment of the present invention. The roller with a built-in motor of the present embodiment has a cylindrical roller body 11 as well as a known roller, and a motor 12 and a speed reducer 13 are built therein. However, in the motor built-in roller 3 of the present embodiment, the motor 12, the speed reducer 13, and the circuit board 15 are unitized. That is, the roller 3 with a built-in motor according to the present embodiment has a motor unit 1 for a roller with a built-in motor (hereinafter, simply referred to as a motor unit) 1 built in a roller body 11. As shown in FIG. 4, the motor unit 1 has a motor 12, a speed reducer 13, and a circuit board 15 housed in a cylindrical case 2.

The motor unit 1 is a kind of geared motor, in which a motor 12 and a speed reducer 13 are built in a housing (case 2), the rotational force of the motor 12 is reduced by the speed reducer, and the output shaft (driving side shaft 8). Is output from.
As shown in FIG. 4, the motor unit 1 of the present embodiment includes a case 2, a fixed side short shaft 4 protruding from the case 2, a drive unit 5 and a circuit board 15 built in the case 2, and a drive unit 5. It is configured by a drive side shaft 8 which receives power and rotates to project from the case 2.
That is, the motor unit 1 of this embodiment is covered with the cylindrical case 2. The drive unit 5 is housed inside the case 2. The drive unit 5 is specifically a motor 12 and a speed reducer 13.

The drive side shaft 8 is exposed at one end of the case 2, and the fixed side short shaft 4 is exposed at the other end.
The drive-side shaft 8 and the fixed-side short shaft 4 are attached to the ends of the case 2 by the drive-side shaft holder 7 and the fixed-shaft holder 10, respectively.
The drive side shaft holder 7 has a bearing 14 inside.

The fixed side short shaft 4 is provided at the end of the motor unit 1 on the central axis, and is fixed integrally to the case 2 by the fixed shaft holder 10. The fixed side short shaft 4 has a hollow inside, and a cable 26 is inserted into the inside thereof. The inside of the motor unit 1 of the cable 26 is connected to the circuit board 15 described above via a lead wire 31, and power is supplied from the circuit board 15 to the motor 12.
A motor-side connector piece (input/output section) 25 is connected to the other end of the cable 26 (outside the motor unit 1).
Therefore, the motor-side connector piece (input/output section) 25 is connected to the circuit board 15 via the cable 26 and the lead wire 31.

The drive unit 5 is composed of the motor 12 and the speed reducer 13 as described above. The motor 12 is a brushless motor including a stator 18 and a rotor 19. In this embodiment, the stator 18 is integrally fixed to the inner surface of the case 2. A rotor 19 of the motor is rotatably held at the center of the stator 18.

In this embodiment, a permanent magnet is used for the rotor 19. The stator 18 is a coil (winding) of three systems (U phase, V phase, W phase).
That is, the motor adopted in this embodiment is a brushless motor, and the stator 18 has three coils (U phase, V phase, W phase) as shown in the circuit diagram of FIG. Further, magnetic pole detecting means H1, H2, H3 for detecting the rotational position of the permanent magnet as the rotor 19 are provided. The magnetic pole detection means H1, H2, H3 are specifically Hall ICs.
The Hall IC is configured by integrating all or part of the Hall element and the power switching circuit. More specifically, the Hall IC is a Hall element that detects the magnitude of a magnetic field, an amplifier that amplifies a minute signal detected by the Hall element, and a Schmitt trigger that shapes the signal amplified by the amplifier into a square wave. It includes a circuit, a stabilized power supply circuit, and a temperature compensation circuit. In the present embodiment, an example in which the Hall IC is adopted to detect the position of the magnetic pole has been shown, but the present invention is not limited to this, and a photo interrupter type using a light emitting diode and a photo sensor or a magnetic saturation element is used. Any type of magnetic pole position detecting means such as an inductance type may be adopted.

The stator 18 has three coils (U phase, V phase, W phase) Y-connected as shown in the circuit diagram of FIG. That is, one ends of the coils (U phase, V phase, W phase) are connected to each other. The other ends of the coils (U-phase, V-phase, W-phase) are respectively connected to the second terminal and the third terminal of the motor-side connector piece 25, which is an input/output section, as shown in FIG. The terminal is connected to the fourth terminal.

The speed reducer 13 is provided between the motor 12 and the drive-side shaft 8 and serves to reduce the rotational speed of the motor 12 and transmit it to the drive-side shaft 8.

The layout of each member in the case 2 is as shown in FIG. 4, and the fixed side short shaft 4 is fixed to one end of the case 2 by the fixed shaft holder 10, and the fixed side short shaft 4 is at the end of the case 2. It is interrupted and has not entered the back of Case 2.
A circuit board 15 is arranged on the inner side of the fixed shaft holder 10. Further, a motor 12 and a speed reducer 13 are provided further inside the circuit board 15. The output shaft of the reduction gear 13 projects from the other end of the case 2 as the drive shaft 8.

The motor unit 1 has been described above. Next, the motor built-in roller 3 in which the motor unit 1 is incorporated will be described.
In addition to the motor unit 1 described above, the roller 3 with a built-in motor includes a roller body 11, a roller inner shaft support member 23, and lid members 16 and 17 (FIG. 3).

Here, the roller body 11 is a cylinder whose both ends are open. The roller inner shaft support member 23 is integrally provided inside the roller body 11 as shown in FIG. 3, and has a hexagonal opening 34 at the center.
The one lid member 16 is formed by integrating a cylindrical roller main body fitting member 52, a double bearing 54 and a main body side short shaft member 53, as shown in the left end of FIG. The other one lid member 17 has a structure as shown at the right end of FIG. 2, and the roller body fitting member 55 and the bearing 22 are integrated.

In the motor built-in roller 3 of the present embodiment, the motor unit 1 is inserted into the roller body 11, and the drive side shaft 8 of the motor unit 1 is engaged with the opening 34 of the roller inner shaft support member 23. Further, in the motor built-in roller 3 of the present embodiment, lid members 16 and 17 are attached to both ends of the roller body 11.
In the present embodiment, the tip side of the fixed-side short shaft 4 of the motor unit 1 protruding from the roller body 11 constitutes one fixed shaft 20 of the motor built-in roller 3 itself.

On the other hand, on the other end side of the roller body 11, a roller body fitting member 52, a cover member 16 in which a bearing 54 and a body side short shaft member 53 are integrated are attached.
In the present embodiment, the main body side short shaft member 53 of the lid member 16 constitutes the other fixed shaft 21 of the motor built-in roller 3 itself.

In the motor built-in roller 3, as shown in FIGS. 2 and 3, the fixed shaft (fixed side short shaft) 20 on the motor unit 1 side has a hollow shape, and the cable 26 connected to the motor side connector piece 25 is built therein. ing.
The motor-side connector piece 25 is an input/output unit that inputs and outputs electric power and signals to and from the roller body 11, and is a female-side connector having five terminals.
The motor-side connector piece 25 is one piece of a waterproof round connector, and has five terminals built therein.
Of the five terminals, the first terminal functions as a power supply input terminal for driving a transistor or the like as shown in the circuit diagram of FIG.
The second terminal to the fourth terminal function as power input terminals that supply power to the coils (windings) (U phase, V phase, W phase) of the stator 18. The fifth terminal functions as a voltage signal output terminal that outputs a voltage signal.

Inside the roller body 11, a lead wire 31 connected to the rear end of the motor-side connector piece 25 is connected to the circuit board 15 described above, and power is supplied from the circuit board 15 to the motor 12.

Next, the outline of the controller 50 will be described.
The controller 50 has five terminals corresponding to the first to fifth terminals of the motor-side connector piece 25 on the roller 3 side with built-in motor. The five terminals are connected to the external connector piece 33. The connector piece 33 is connected to the motor-side connector piece 25 on the motor built-in roller 3 side.
The first terminal of the controller 50 serves as a power supply for driving a transistor or the like on the side of the roller 3 with a built-in motor.
The second terminal to the fourth terminal function as power output terminals for supplying power to the coils (U phase, V phase, W phase) U, V, W of the stator 18 on the side of the roller 3 with built-in motor. The fifth terminal functions as a voltage signal input terminal for inputting a voltage signal.

As described above, the motor 12 built in the roller body 11 is a brushless motor, and the stator 18 has three coils (U phase, V phase, W phase) as shown in the circuit diagram of FIG. doing. Further, magnetic pole detecting means (Hall IC) H1, H2, H3 for detecting the rotational position of the permanent magnet as the rotor 19 are provided.
Then, in order to generate a rotating magnetic field inside by the above-mentioned coils (U phase, V phase, W phase), a drive circuit 43 for sequentially supplying current to each coil (U phase, V phase, W phase) is required. The drive circuit 43 is stored in the controller 50. The drive circuit 43 includes a circuit that drives current and a switching circuit that obtains a switching signal.
As shown in FIG. 7, the drive circuit 43 in the controller 50 has an upper arm control unit 41 and a lower arm control unit 42.

The upper arm control unit 41 is a circuit that goes from the second terminal to the motor built-in roller 3 side via the fourth terminal via the switching elements T1, T2, T3 configured by FETs. The lower arm control unit 42 is a circuit that reaches the ground potential (negative power supply side) via the switching elements T4, T5, and T6.
The drive circuit 43 has signal input sections 45 and 46, and Uu, Vu, and Wu terminals connected to the switching elements T1, T2, and T3 of the upper arm control section 41 and the switching elements T4 and T4 of the lower arm control section 42. There are UL, VL, WL terminals connected to T5, T6.
Then, by inputting signals to the Uu, Vu, Wu terminals and the UL, VL, WL terminals, the switching elements T1, T2, T3 of the upper arm control unit 41 are sequentially turned on, and the lower arm control unit 42. The switching elements T4, T5, T6 are sequentially turned on, and the U, V, and W-phase coils of the brushless motor 12 are sequentially switched and energized to rotate the motor 12.

Next, a characteristic configuration of this embodiment will be described. In the motor built-in roller 3 of the present embodiment, the voltage signal forming circuit 56 is constructed on the circuit board 15 in the roller body 11.
The voltage signal forming circuit 56 is as shown in FIG. 5, and has magnetic pole corresponding switching elements Q1, Q2 and Q3 which are turned on/off according to the outputs from the magnetic pole detecting means H1, H2 and H3 and the output from the abnormal temperature detecting means 57. It is composed of a temperature corresponding switching element Q4 which is turned on/off in response to it, and a plurality of resistors R1 to R7.
The magnetic pole corresponding switching elements Q1, Q2, Q3 and the temperature corresponding switching element Q4 are specifically NPN type transistors. The abnormal temperature detecting means 57 is specifically a thermal relay for detecting a case where an overcurrent flows, and when a high temperature is detected, the resistance value rises extremely.

The output lines of the respective magnetic pole detection means (Hall ICs) H1, H2, H3 are connected to the bases of the NPN transistors which are the magnetic pole corresponding switching elements Q1, Q2, Q3. A power supply line is connected to the collectors of the magnetic pole corresponding switching elements Q1, Q2, Q3.
The power supply line is a line connected to the first terminal of the five terminals of the motor-side connector piece 25 described above.
The power supply line is divided by the resistor R7 and the abnormal temperature detecting means 57, and the intermediate point between the resistor R7 and the abnormal temperature detecting means 57 is connected to the base of the NPN transistor which is the temperature corresponding switching element Q4. A power supply line is connected to the collector of the temperature corresponding switching element Q4.

The emitters of the magnetic pole corresponding switching elements Q1, Q2, Q3 and the temperature corresponding switching element Q4 are resistors R1 (first resistor), R2 (first resistor), R3 (first resistor), R4 (second resistor), R5 ( The second resistor) and R6 (third resistor) are connected to the resistor circuit. Further, R1 and Q1 form a magnetic pole corresponding switching unit SW1. R2 and Q2 form a magnetic pole corresponding switching unit SW2. R3 and Q3 form a magnetic pole corresponding switching unit SW3. R6 and Q4 form a temperature corresponding switching unit SW4.
The resistors R1 to R6 form a ladder type resistor circuit together with a resistor R8 described later.
That is, one ends of the resistors R1, R2 and R3 are connected to the emitters of the magnetic pole corresponding switching elements Q1, Q2 and Q3, respectively.
Further, one end of a resistor R6 is connected to the temperature corresponding switching element Q4.
Further, the other ends of the resistors R1 to R3 and the resistor R6 are connected in series with the resistors R4 and R5 interposed therebetween, and are connected to the fifth terminal of the motor-side connector piece 25.
That is, the resistor R6 connected to the temperature corresponding switching element Q4 is connected to the resistor R1 connected to the magnetic pole corresponding switching element Q1, and the resistor R1 is connected to the magnetic pole corresponding switching element Q2 across the resistor R4. Further, the resistor R2 is connected to the resistor R3 connected to the switching element Q3 with the resistor R5 interposed therebetween, and the end thereof is connected to the fifth terminal of the motor side connector piece 25 via the lead wire 31 and the cable 26. There is.

The resistors R1 to R6 have different resistance values. Each of the resistors R1 to R6 constitutes a part of the ladder type resistance circuit.
The relationship between the resistance values is as follows.

R6<R5≦R4<R3<R2<R1

In the above formula, the ratios of R3, R2, and R1 are all about twice.
Further, the ratio of the resistance value of R6 to the resistance values of R3, R2, and R1 is 8 times or more, which is extremely large.

Further, the ground terminals of the magnetic pole detecting means (Hall IC) H1, H2, H3 described above are connected to the respective coils (U-phase, V-phase, W-phase) and the power input terminal (secondary) via the rectifiers as shown in FIG. It is connected to the power supply line connecting the terminal to the fourth terminal).
The magnetic pole detecting means H1, H2, H3 have Hall elements built therein and have a power supply voltage input terminal (VCC), an output terminal (OUT), and a ground terminal (GND). The ground terminals of H1, H2, and H3 are connected to each other, thereby forming a ground line. The power supply line is connected to the power supply voltage input terminal (VCC), and the output terminal (OUT) is connected to the bases of the magnetic pole corresponding switching elements Q1, Q2 and Q3 as described above.
The ground terminals of the magnetic pole detection means (Hall ICs) H1, H2, H3 are connected to the power supply lines of the coils (U phase, V phase, W phase) via rectifiers. The direction of the rectifier is such that the energization from the magnetic pole detection means (Hall IC) H1, H2, H3 side to the power supply line side is allowed and the opposite is blocked.

In this embodiment, the U-, V-, and W-phase coils of the motor 12 are sequentially switched and energized to rotate the motor 12. That is, current is supplied to each coil (U-phase, V-phase, W-phase) by three power lines, but at least one of them is required to energize each coil (U-phase, V-phase, W-phase). One power line must be grounded. In the present embodiment, the ground terminals of the magnetic pole detection means (Hall IC) H1, H2, H3 are connected to the power supply lines of the coils (U-phase, V-phase, W-phase) via rectifiers, and H1, H2. , H3 are connected to each other to form a ground line, and the direction of the rectifier is such that the magnetic pole detection means (Hall IC) H1, H2, H3 side allows the energization to the power supply line side. Since the opposite direction is blocked, a current flows from the ground terminal of the magnetic pole detection means (Hall IC) H1, H2, H3 to the power line in the ground state. Therefore, the magnetic pole detection means (Hall IC) H1, H2, H3 are energized, and the magnetic pole detection means (Hall IC) H1, H2, H3 function.

Next, a characteristic circuit of the controller 50 will be described.
The controller 50 has the drive circuit 43 as described above, and is further provided with the voltage signal analysis means 60. As shown in FIG. 7, the voltage signal analysis means 60 has one input terminal 61 and six output terminals 62, and selectively generates voltages at the six output terminals 62 according to the input voltage. It has a circuit.
In the present embodiment, the fifth terminal (voltage signal input terminal) of the controller 50 is connected to the input terminal 61 of the voltage signal analysis means 60. Further, one end of a resistor R8 for voltage division is connected to the fifth terminal and the input terminal 61. The other end of the resistor R8 is grounded.
Therefore, the voltage divided by the resistor R8 is applied to the input terminal 61 of the voltage signal analysis means 60.

Next, the function of the motorized roller system 100 of the present embodiment will be described. The above-described motor built-in roller 3 and the controller 50 are electrically connected by connecting the male side connector piece 33 on the controller 50 side to the motor side connector piece 25 on the motor built-in roller 3 side.
Therefore, from the first terminal on the controller 50 side, electric power for driving the transistors and the like is supplied into the roller 3 with a built-in motor.
Further, a predetermined voltage signal is input from the voltage signal forming circuit 56 to the controller 50 side from the motor built-in roller 3 side.
In the present embodiment, the voltage signal forming circuit 56 and the voltage dividing resistor R8 in the controller 50 form a ladder type resistor circuit. Then, the voltage signal generated between the voltage signal forming circuit 56 and the voltage dividing resistor R8 is analyzed by the voltage signal analyzing means 60 of the controller 50. Then, the drive circuit 43 is controlled so that currents are sequentially supplied to the coils (U phase, V phase, W phase) on the roller 3 side with built-in motor, the motor 12 rotates, and the roller body 11 of the roller 3 with built-in motor is rotated. Rotates.

That is, in the motor built-in roller 3 of the present embodiment, the voltage signal forming circuit 56 is provided inside the roller body 11, and the voltage signal forming circuit 56 detects the magnetic pole detecting means (Hall IC) H1, H2, H3. Then, a voltage according to the detection status of the abnormal temperature detection means 57 is generated at the input terminal 61 of the voltage signal analysis means 60.
That is, the combined resistance of the voltage signal forming circuit 56 changes according to the detection status of the magnetic pole detection means (Hall ICs) H1, H2, H3, and is divided by the combined resistance and the voltage dividing resistance R8 in the controller 50. The voltage input to the input terminal 61 changes.
In the present embodiment, the rotation angle of the rotor 19 of the motor 12 and the on/off states of the three magnetic pole detecting means H1, H2, H3 are as shown in the upper graph of FIG.

The magnetic pole detection means H1 and H3 are in the ON state and the magnetic pole detection means H2 is in the OFF state between 0 and 30 degrees with reference to an appropriate rotation angle.
During the subsequent 30 to 60 degrees, only the magnetic pole detecting means H1 is in the on state and the magnetic pole detecting means H2 and H3 are in the off state. During the subsequent 60 to 90 degrees, the magnetic pole detecting means H1 and H2 are in the ON state and the magnetic pole detecting means H3 is in the OFF state. During the subsequent 90 degrees to 120 degrees, the magnetic pole detection means H2 is turned on and the magnetic pole detection means H1 and H3 are turned off. During the subsequent 120 to 150 degrees, the magnetic pole detecting means H2 and H3 are in the ON state and the magnetic pole detecting means H1 is in the OFF state. During the subsequent 150 to 180 degrees, the magnetic pole detection means H3 is turned on and the magnetic pole detection means H1 and H2 are turned off. In the subsequent 180 degrees to 360 degrees, the above-described state of 0 degrees to 180 degrees is repeated.
The graph illustrates the case where the temperature-corresponding switching element (thermal relay) Q4 is turned on when the rotation angle is between 180 degrees and 360 degrees.

Here, assuming that the abnormal temperature detecting means 57 is not functioning, only the magnetic pole detecting means H1 is in the ON state and the magnetic pole detecting means H2, H3 are in the OFF state between 30 degrees and 60 degrees. Only the magnetic pole corresponding switching element Q1 is turned on, and the voltage of 12 V supplied to the magnetic pole corresponding switching element Q1 is reduced by the resistors R1, R4 and R5 and output from the voltage signal forming circuit 56.
During the subsequent 60 to 90 degrees, the magnetic pole detecting means H1 and H2 are in the ON state and H3 is in the OFF state, so that the magnetic pole corresponding switching elements Q1 and Q2 are in the ON state. Therefore, 12V supplied to the magnetic pole corresponding switching element Q1 is combined with the voltage derived from the magnetic pole corresponding switching element Q1 and the voltage derived from the magnetic pole corresponding switching element Q2, which are decompressed by the resistors R1, R4 and R5, and the voltage signal forming circuit is formed. It is output from 56.

In this way, the combination in which the magnetic pole detection means (Hall ICs) H1, H2, H3 detect the magnetic poles is changed according to the rotation angle of the rotor 19 of the motor 12, and accordingly, the combination with the voltage signal forming circuit 56 is changed. A unique voltage is generated between the voltage dividing resistor R8 in the controller 50. Specifically, the voltage shown in FIG. 8 is generated between the voltage signal forming circuit 56 and the voltage dividing resistor R8 according to the combination in which the magnetic pole detecting means (Hall IC) H1, H2, H3 detect the magnetic pole. To do. Then, this voltage signal is input to the input terminal 61 of the voltage signal analysis means 60 of the controller 50.

In the controller 50, the signal from the voltage signal forming circuit 56 is input from one input terminal 61. In the controller 50, the signal from the voltage signal forming circuit 56 is divided between the voltage dividing resistor R8 and the voltage dividing resistor R8 to generate a specific voltage, and the voltage signal is input to the voltage signal analyzing means 60. Then, the voltage signal analyzing means 60 selectively generates voltages at the six output terminals 62 according to the input voltage. That is, the six output terminals 62 are turned on and off so that the drive circuit 43 is switched so that the rotor 19 of the motor 12 keeps rotating. As a result, the energized coils (U phase, V phase, W phase) are switched according to the rotation angle of the rotor 19.

Further, when a situation occurs such that an overcurrent flows through the motor 12 and the abnormal temperature detecting means 57 functions, the temperature corresponding switching element Q4 is turned on. Therefore, the voltages derived from the temperature corresponding switching element Q4 are added and output from the voltage signal forming circuit 56.
Here, in the present embodiment, the resistance value of the resistor R6 connected to the temperature-corresponding switching element Q4 is lower than that of the other resistors, so that the voltage derived from the temperature-corresponding switching element Q4 (from the voltage signal forming circuit 56 in the controller 50) Voltage generated by the voltage dividing resistor R8 and the voltage dividing resistor R8) is higher than the voltages derived from the other magnetic pole corresponding switching elements Q1, Q2, Q3.
That is, since the resistance value of the resistor R6 connected to the temperature corresponding switching element Q4 is lower than the other resistors, the combined resistance of the voltage signal forming circuit 56 decreases and the voltage divided by the voltage dividing resistor R8 increases. To do.
Therefore, when the abnormal temperature detecting means 57 functions, an apparently high voltage is input to the voltage signal analyzing means 60 as shown in FIG.
That is, when the abnormal temperature detecting means 57 functions (when an abnormality occurs), the voltage division (voltage) based on the signal output from the voltage signal forming circuit 56 is a certain threshold value or more, and the abnormal temperature detecting means 57 functions. If not (normal time), the voltage division (voltage) based on the signal output from the voltage signal forming circuit 56 is less than a certain threshold value. The voltage output from the voltage signal forming circuit 56 when the abnormal temperature detecting means 57 functions in this way is in a voltage region different from that in the normal case.
When the voltage signal analysis means 60 of the controller 50 receives this high voltage signal, an emergency stop circuit (not shown) operates to stop the motor 12.

In the motor-equipped roller system 100 of this embodiment, the motor-side connector piece 25 on the motor-incorporated roller 3 side and the connector piece 33 on the controller 50 side are one piece of a waterproof round connector. Generally, a waterproof connector has a small number of terminals, and a connector having 9 terminals is not practically commercialized. Therefore, it was difficult to adopt a waterproof connector in the conventional motor built-in roller, whereas in the present embodiment, since the number of terminals is only five, it is possible to adopt a waterproof connector. Became.

In the present embodiment, the resistances having different values are used as the first resistances R1, R2, R3, but the same value may be used. Further, in the present embodiment, the resistors R4 and R5 which are the second resistors are resistors having a smaller value than the resistors R1, R2 and R3 which are the first resistors, but they may have the same value or a larger value.

In the embodiment of FIG. 5, the outputs of the magnetic pole detection means H1, H2, H3 are assumed to be "high level" outputs in the ON state. However, the present invention is not limited to this, and a Hall IC that outputs “low level” in the ON state may be used. That is, as shown in FIG. 13, it is possible to use the PNP type transistors for the magnetic pole corresponding switching elements Q1', Q2' and Q3'. In FIG. 13, the temperature-corresponding switching element Q4′ is also a PNP type, and the collector-side output voltage in the ON state of Q4′ is set to the same level as the collector-side output level in the ON state of the magnetic pole-corresponding switching elements Q1′ to Q3·′. I am trying to become. Therefore, the temperature-corresponding switching element has a two-stage structure of Q4' and Q5, and when the resistance value of the abnormal temperature detecting means 57 becomes extremely large, Q5 is turned on and accordingly Q4' is turned on. However, as in the case of FIG. 5, only Q4 may be configured, and a temperature-compatible switching configuration in which an NPN transistor is used for Q4 may be used.

Also, the output of the voltage forming circuit 76 can be superimposed on the first terminal as shown in FIG. In this case, the fifth terminal becomes unnecessary, and the number of terminals is four. As shown in FIG. 15, in the motor built-in controller, the first terminal is connected to +12V (power supply line) via the resistor r having a small resistance value. The detection state of the magnetic pole detection means H1, H2, H3 and the detection state of the abnormal temperature detection means can be known from the voltage fluctuation across the resistance. Further, instead of the voltage forming circuit 76 of FIG. 14, the voltage forming circuit 86 of FIG. 16 (a circuit in which R4 and R5 are not used in FIG. 14) can be used.

The above-described motor built-in roller 3 has the motor 12 and the speed reducer 13 built in the roller body 11, but the speed reducer 13 is not always necessary.

In the above-described embodiment, the first terminal of the motor-side connector piece 25 or the like is used as the power source input terminal for driving the transistor or the like, but the power source for driving the transistor or the like may be branched from the power line for feeding the stator 18. ..

Each of the switching elements Q1, Q2, Q3, Q4, T1, T2, T3, T4, T5, T6 described above is directly connected to the base or the like by the output signal from the Hall IC, the resistor R7 and the abnormal temperature detecting means 57. It is turned on and off by inputting a divided voltage signal or the like. For example, the signal output from the Hall IC or the signal voltage generated by the resistor R7 and the abnormal temperature detection means 57 is input to another buffer transistor or the like. The output of the buffer transistor may be input to the switching elements Q1, Q2, Q3, Q4, T1, T2, T3, T4, T5, T6.

Further, in the embodiment described above, the voltage signal forming circuit 56 is made separately from the Hall IC (the magnetic pole detecting means H1, H2, H3), but the voltage signal forming circuit 56 incorporates the switching circuit incorporated in the Hall IC. The circuit 70 may be configured.
That is, since the Hall IC is configured by integrating the Hall element and the power switching circuit in whole or in part, it has a switching circuit inside.
FIG. 9 is a circuit diagram in the case of configuring the voltage signal forming circuit 70 by incorporating the switching elements q1, q2, q3 incorporated in the Hall ICs (H1, H2, H3). The same members as those in the above-described embodiment are designated by the same reference numerals.
In the figure, h1, h2, and h3 are Hall elements provided in the Hall ICs (H1, H2, H3).

When the hall element h1 detects the magnetic pole and becomes energized, the voltage derived from the magnetic pole detection means H1 disappears. Similarly, when the Hall element h2 detects a magnetic pole and becomes energized, the voltage derived from the magnetic pole detection means H2 disappears, and when the Hall element h3 detects a magnetic pole and becomes energized, the voltage derived from the magnetic pole detection means H3 disappears. To do.
In this way, the combination in which the magnetic pole detection means (Hall elements h1, h2, h3) in the Hall IC detects the magnetic pole is changed according to the rotation angle of the rotor 19 of the motor 12, and the voltage signal is accordingly changed. A unique voltage is generated in the forming circuit 70. Specifically, different voltages are generated depending on the combination in which the magnetic pole detection means H1, H2, H3 detect magnetic poles. Then, this voltage signal is input to the controller 50.

The motor unit 1 used in the above-described embodiment is a kind of geared motor as described above, and the present invention is also applicable to a geared motor.
Further, the present invention is not limited to being built in the roller 3 with a built-in roller motor, and can be applied to a normal geared motor.
10, 11, and 12 show a geared motor 71 according to an embodiment of the present invention. The same members as those in the above-described embodiment are designated by the same reference numerals.
As shown in FIG. 13, the geared motor 71 has a motor 72 and a speed reducer 13 built in a housing 72, and the rotational force of the motor 12 is reduced by the speed reducer and output from the output shaft (driving side shaft 8). is there. The geared motor 71 of the present embodiment is rotated by a housing 72, the fixed-side short shaft 4 protruding from the housing 72, the drive unit 5 and the circuit board 15 built in the case 2, and the power of the drive unit 5. The drive shaft 8 projects from the case 2.
The voltage signal forming circuits 56, 66, 70, 76 and 86 are constructed on the circuit board 15.

1 Motor unit (Gard motor)
3 Motor built-in roller 11 Roller main body 12 Motor 13 Reducer 15 Circuit board 18 Stator 19 Rotor 25 Motor side connector piece (input/output section)
43 drive circuit 50 controller for roller with built-in motor 56 voltage signal forming circuit 57 abnormal temperature detecting means 60 voltage signal analyzing means 70 voltage signal forming circuit 71 geared motor 72 housing 100 roller system with built-in motor Q1, Q2, Q3 magnetic pole corresponding switching element Q1' , Q2', Q3' Magnetic pole compatible switching elements Q4, Q4' Temperature compatible switching elements H1, H2, H3 Magnetic pole detection means (Hall IC)
R1 resistor, first resistor R2 resistor, first resistor R3 resistor, first resistor R4 resistor, second resistor R5 resistor, second resistor R6 resistor, third resistor SW1, SW2, SW3 magnetic pole corresponding switching unit SW4 temperature corresponding switching unit h1, h2, h3 magnetic pole detection means

Claims (1)

At least a motor is built in the roller body, and the motor built-in roller that rotates the roller body by transmitting the rotational force of the motor to the roller body,
It has an input/output unit for inputting and outputting electric power and signals inside and outside the roller body,
The motor has a stator composed of a plurality of windings, a rotor, and a plurality of magnetic pole detection means, and is a target for supplying electric power to the outside of the roller body according to the rotational position of the rotor. It is a brushless motor that switches windings,
At least a magnetic pole corresponding switching element which is turned on/off according to the output from the magnetic pole detection means and a voltage signal forming circuit composed of a plurality of resistors are built in the roller body, and the combined resistance of the voltage signal forming circuit detects the magnetic pole. The resistance value varies depending on the combination of the magnetic pole detection means
A roller with a built-in motor, wherein a voltage signal forming circuit outputs a different voltage to the input/output unit depending on a combination of magnetic pole detecting means for detecting a magnetic pole.

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