JPH0379572A - Controller for hydraulic elevator - Google Patents

Abstract

PURPOSE:To control the number of revolution of an electric motor, i.e., cage speed with high precision by constituting a controller for hydraulic elevator so that the electric motor pattern is corrected by the speed difference obtained through the feedback of the actual cage speed signal. CONSTITUTION:Pattern generators 41U and 41D for generating the electric motor patterns for driving an electric motor and a speed detector which detects the actual speed of a cage and outputs the actual cage speed signal 60a are installed. Then, the actual cage speed signal 60a is subtracted from the electric motor pattern by a subtraction calculator 62, and the speed difference is generated. The speed difference is added onto the electric motor pattern by an adder 63, and the corrected electric motor pattern P is generated.

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to an elevator car (hereinafter simply referred to as a car).
This is a hydraulic elevator control system that can control the speed of the elevator with high precision.

[Prior Art] Conventionally, various methods have been applied to hydraulic elevator control devices, such as a control method using a flow rate control valve, a pump control method, and an electric motor rotation speed control method.

Among these, the control method using a flow control valve is such that when the elevator is ascending, the electric motor for sending and receiving pressure oil is rotated at a constant speed to return a certain amount of pressure oil discharged from the hydraulic pump to the tank, and a start command is issued. When this occurs, the speed of the car is controlled by adjusting the amount of pressurized oil returned to the tank with a flow control valve, and when descending, the speed is controlled by adjusting the descent due to the car's own weight with a flow control valve. be. In this control method, excess pressure oil is circulated when ascending, and potential energy is consumed by heat generation of the pressure oil during descending, resulting in a large energy loss and a large temperature rise in the pressure oil.

On the other hand, the pump control system and the motor rotation speed control system suppress the energy loss by sending only the necessary amount of pressure oil when ascending and regeneratively braking the electric motor during descending. However, among these, the pump control method uses a variable displacement pump to control the discharge amount, and the structure of the control device and the pump becomes complicated and expensive.

On the other hand, the motor rotation speed control method uses variable voltage variable frequency (
V V V F ) This uses an inverter to control the rotation speed of the electric motor over a wide range, and uses a constant discharge pump to control the discharge amount by changing the motor rotation speed, making it inexpensive and reliable. expensive.

However, since hydraulic pumps always have leakage, a method is used to match the car speed by adding a bias pattern to correct the speed pattern of the electric motor according to the amount of leakage and a running pattern corresponding to the car speed. is proposed.

FIG. 6 is a configuration diagram showing a conventional hydraulic elevator control device using an electric motor rotation speed control method, as described in Japanese Patent Publication No. 64-311, for example, and FIG. 7 shows the function of the speed control device in FIG. 6. The block diagram shown in FIG. 8 is a waveform diagram showing a pattern when rising.

In Figure 6, the bit in the hoistway (1) has a cylinder (
2) is buried, and the cylinder (2) is filled with pressure oil (3). A car (5) is installed on the top of the plunger (4) supported by pressure oil (3) via a car floor (5a), and a plurality of boarding platforms (7) are installed on the side wall of the hoistway (1).
> has been installed. A load detection device (6) is provided on the car floor (5a), and a cam (8) is provided on the side outer wall of the car (5).
) is provided. There is a cam (8) on the inner wall of the hoistway (1).
) A plurality of deceleration command switches (9) and stop command switches (10) are provided so as to face each other.

Pressure oil (3) in the cylinder (2) communicates with the electromagnetic switching valve (11) via a pipe (lfa). The electromagnetic switching valve (1) always functions as a check valve ε, and conducts in the opposite direction when the electromagnetic coil (llb>) is energized.

The hydraulic pump (12), which communicates with the electromagnetic switching valve (11) via a pipe (12a), is rotated in the opposite direction by a three-phase induction motor (hereinafter simply referred to as electric motor) (13), and the hydraulic pump (12) communicates with the electromagnetic switching valve (11). ) to send and receive pressure oil <3). The electric motor (13) is provided with a speed generator (14) for detecting the rotational speed, which is composed of a digital pulse encoder using, for example, a photocoupler.

The hydraulic pump (12) is provided with a tank (15) that stores pressure oil (3), and the pressure oil (3) is sent and received between the two via a pipe (15a). There is. The tank (15) is provided with an oil temperature detection device (16) that detects the temperature of the pressure oil (3).

VVVF the number of revolutions (speed) of the electric motor (43)! The inverter circuit (20) controlled by II is a three-phase AC power source R, S, T.
A rectifier (21) that receives as input, a capacitor (22) that smoothes the DC voltage from the rectifier (21), and pulse width control of the DC voltage across the capacitor (22) to create a VVF.
an inverter (23) that outputs a three-phase AC voltage;
The DC voltage from the capacitor (22) is connected to the three-phase AC power supply R,
It is equipped with a regenerative inverter (24) that returns the power to S and T.

Between the electric motor (13) and the inverter circuit (20) are normally open contacts <30a) to (30c) of a running contactor (not shown).
) has been inserted.

Speed control device (2) for controlling the inverter (23)
5) is the deceleration command signal (
9a), stop command signal (10*) from stop command switch <10>, speed signal <1 from speed generator (14)
4a), and a control signal (25m) is output based on the operating signal via the normally open contact (30d) of the operating contactor.

The load on the car (5) can also be detected from the pressure of the pressure oil (3) directly above the hydraulic pump (12) or the cylinder (2), so the load detection device (6) installed on the car floor (5a) )
can be omitted.

The speed control device (25) is configured as shown in FIG. 7, and the delay circuit (40) outputs the operating signal through the normally open contact (30d) with a certain period of delay.

The upward running pattern generation circuit (41) which becomes the pattern generation section
U) and a descending travel pattern generation circuit (41D) each generate a predetermined travel pattern based on the driving signal delayed by the delay circuit (40), and also generate a deceleration command signal (9a).
> switches the driving pattern to low speed. The output terminal of the upward running pattern generation circuit (410) has an upward contact (41) that is closed only during the upward running period.
Ua) is connected, and the downward running pattern generation circuit (41D
) is connected to a downward contact (41Da) that is closed only during the descending operation period.

Bias pattern setting circuit (4) which constitutes a pattern generation section together with each pattern generation circuit (41U) and (41D)
2) is to initialize the leakage amount based on the variation in the leakage amount of the hydraulic pump (12), the load, and the oil temperature T. For example, when the oil temperature is 20"C with no load, the hydraulic pump (12) The hydraulic pump (1 rotation) corresponds to 1 leak in (12)
2) It is designed to output a pattern command that rotates. The computing unit (43) operates based on the load signal (6a) from the load detection device (6>) and the oil temperature signal (lea) from the oil temperature detection device (16), and calculates the signal based on the load fluctuation ΔL and the oil temperature fluctuation ΔT. The adder (44) outputs a correction signal using the bias pattern setting circuit (
The pattern command from 42) and the correction signal from the arithmetic unit (43) are added together to output a correction pattern command.

The bias pattern generation circuit (45) is an adder <44)
The bias pattern based on the correction pattern command from
It is activated by the operation signal via the normally open contact (3 (LJ), and the stop command signal from the stop command switch (10) (IO
JL), and generates a bias pattern to rotate the hydraulic pump (12) at a rotation speed corresponding to the amount of leakage of pressure oil (3) from the hydraulic pump (12) at that time. There is.

The adder (46>) adds a bias pattern to the upward running pattern via the upward contact (410a) or the downward running pattern via the downward contact (410a), and
(13) A motor pattern corresponding to the rotation speed is output.

The conversion circuit (47) is configured to match the level of the speed signal (14a) from the two-speed generator (14) with the level of each travel pattern. The subtracter (48) is an adder (
The deviation between the motor pattern from 46) and the speed signal (14m) via conversion circuit N (47) is calculated, and the subtraction result is input to the transmission circuit 49). Adder (
50) is a speed signal (14a) which is converted into a pattern deviation amplified by a transmission circuit (49) and which is converted to a speed signal (14a) via a conversion circuit (47).
is added, and a frequency command signal ω0 is output. The function generator (51) is designed to generate a voltage command signal (2) that varies linearly with respect to the frequency command signal ω0. The reference sine wave generation circuit (52) is configured to output a control signal (25a>) to the inverter (23) based on the frequency command signal ω0 and the voltage command signal V. This control signal (25a) allows The inverter (23) is configured to generate a sinusoidal three-phase AC voltage.

In FIG. 8 showing each pattern waveform, (a) is an upward running pattern, (b) is a bias pattern, (c) is a motor pattern, and (d) is a car speed pattern corresponding to the speed of car (5>). It is.

Next 1. While referring to the pattern waveform diagram in FIG.
The specific operation of the conventional hydraulic elevator control device shown in FIGS. 7 and 7 will be explained. Incidentally, since the ascending and descending running patterns differ only in polarity, here,
Only the rising time will be explained.

Now, if the car (5) is stopped and a call occurs in the upward direction, the start command is output after the door of the car (5) is closed, and the operating contactor is energized and normally open. 6 normally open contacts (3) with contacts (30a) to (30d) closed;
0m) to (30c), the electric motor (13) is connected to the inverter (23) and powered, and by closing the normally open contact (30cl), the bias pattern generation circuit (45) is connected to the inverter (23). A bias pattern is started from time to as shown in FIG. 8(b).

With this bias pattern, the inverter (23) outputs low voltage and low frequency three-phase AC, and the electric motor (13)
drives the hydraulic pump (12) at a low rotational speed corresponding to the amount of leakage of the hydraulic pump (12). Therefore, the car (5) will not rise due to driving by the bias pattern.

Next, at time t1 after a certain period of time has elapsed, the upward running pattern generation circuit (
41U) is activated and generates an upward running pattern that starts from time tl as shown in FIG. 8(b). This results in
Since the adder (46) adds the ascending running pattern and the bias pattern and outputs the motor pattern shown in FIG. 8(c), the electric motor l1l (13) gradually increases the rotation speed.
The hydraulic pump (12) sends out pressure oil (3) in excess of the leakage amount. Pressure oil (3) is piped (15 m) from the tank (15).
, hydraulic pump (12>, pipe (12a), electromagnetic switching valve (1)
1) and is delivered to the cylinder (2) through a tube (lim). Therefore, the car (5) is the eighth lff1 (d
), the vehicle travels in the upward direction with a speed pattern that corresponds to the upward travel pattern.

When the car (5) reaches a constant speed and further rises until it reaches a predetermined position in front of the destination floor at time t2, the cam (8) operates the deceleration command switch <9> and the deceleration command signal (9a) is set to 1.
generate. In response to this, the upward running pattern gradually decreases and eventually reaches a constant value, so that the car (5) moves at time t2.
It is then decelerated and continues to rise at a constant low speed. Then, when the cam (8) activates the stop command switch (10) at time t3, the upward traveling pattern is further reduced and at time t
It becomes zero at 4.

On the other hand, the bias pattern also decreases from time t3, and time t
5, the motor pattern output from the adder (46) rapidly decreases between times t3 and t4. Then, at time ts when the amount of pressurized oil in the hydraulic pump (12) becomes less than the amount equivalent to one leak, the car (5) stops.

Conversely, during descending operation, the descending traveling pattern generation circuit ('4
1D) outputs a descending running pattern with a polarity opposite to that in Fig. 8(a), so the electric motor <13> once rotates forward due to the bias pattern, and then gradually lowers the rotation speed until it reaches zero rotation speed. Rotate in the opposite direction. Below, basket (5) is
The vehicle travels according to the descending travel pattern in the same manner as described above. At this time, the electromagnetic coil (llb) is excited and the electromagnetic switching valve (
11) is open, allowing the pressure oil (3) to flow back.

In this way, in the control method using the bias pattern, starting shock is prevented by balancing the hydraulic pressure in advance, so that good performance is exhibited for the hydraulic elevator. However, since the speed of the car (5) is controlled on the premise that there is not much difference between the amount of leakage when the hydraulic pump (12) rotates at low speed and the amount of leakage when it rotates at high speed, the speed of the car (5) is If the amount of leakage changes due to
It is not always possible to correct with sufficient accuracy.

Generally, the leakage amount Q4 of the hydraulic pump (12) is the pressure oil (
3) is a function of the viscosity μ, the rotation speed N of the hydraulic pump (12), the load pressure P, and the leakage coefficient, and QL=−f(
μ, N, P). Therefore, depending on the condition of the hydraulic pump (12), the leakage amount QL during low speed rotation and high speed rotation differs.
With a constant bias pattern, it is not possible to compensate for leakage for the entire speed of the car (5). As a result, the basket (5)
An error may occur in the speed control of the hydraulic elevator, resulting in a decrease in the performance of the hydraulic elevator control device, and in some cases, non-ignorable phenomena may occur, such as the car (5) reaching a stopping point at high speed and a decrease in landing accuracy. I end up.

[Problem M1 to be solved by the invention As described above, the conventional hydraulic elevator control device corrects the running pattern using a constant bias pattern, so that a predetermined error occurs due to fluctuations in the amount of leakage with respect to the car speed. Since it is included in the motor pattern, the motor rotation speed cannot be controlled with sufficient precision, leading to wasted low-speed running time, and conversely, high-speed running reduces landing accuracy. .

This invention was made in order to solve the above-mentioned problems, and aims to provide a hydraulic elevator control device that can control the motor rotation speed with high precision by feeding back the actual car speed and correcting the motor pattern. purpose.

Another invention of the present invention is to obtain a hydraulic elevator control device that prevents hunting by disabling the elevator speed feedback while the hydraulic pump is being driven only by the bias pattern before the travel pattern occurs. The purpose is to

[Means for Solving the Problem] A hydraulic elevator control device according to the present invention includes a speed detection device that detects the actual speed of a car and outputs a real car speed signal, and a speed detection device that subtracts the real car speed signal from an electric motor pattern. This includes a subtracter that generates a speed deviation by adding the speed deviation to the motor pattern and an adder that generates a corrected motor pattern by adding the speed deviation to the motor pattern.

Further, in a hydraulic elevator control device according to another aspect of the present invention, a subtracter that generates a speed deviation by subtracting an actual car speed from a traveling pattern included in an electric motor pattern and an adder that generates a corrected electric motor pattern. In addition, a switching means is inserted which is closed according to the rising timing of the running pattern.

[Operation] In the present invention, the motor pattern is corrected based on the speed deviation obtained by comparing the motor pattern and the actual car speed, and the actual car speed is controlled with high precision.

Further, in another aspect of the present invention, when correcting leakage 1 using a bias pattern, only load (torque) control is performed by disabling the feedback of the actual car speed signal, and when the running pattern starts, the actual car speed signal is Switching to control by feedback, smooth start-up that prevents hunting and accurate car speed control are performed.

[Embodiment 1] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. 1st
FIG. 2 is a block diagram showing an embodiment of the present invention, and FIG. 2 is a block diagram showing the functions of the speed control device in FIG.
In each figure, (1) to (24) and (30) to (52
> is the same as above. The cam (8), deceleration command switch (9) and stop E command switch (10) are
It is not shown here to avoid complication of the drawing.

The speed detection device (60) detects the actual speed of the car (5) and outputs an actual car speed signal (60a), and is connected to the moving loop wire connected to the car (5). and a pulley part that supports the wire part at both the upper and lower ends of the hoistway (1).

The speed control device (25A) is a real car speed signal (60m)
Conversion time IW to match the level of the running pattern with the running pattern! (6
1) and each running pattern generation circuit (41,0) or (4
1, 0) through the running pattern and the conversion circuit (61),
A subtracter (62) outputs a speed deviation ΔV by calculating the deviation from the actual car speed signal (60a), and an adder (46) calculates the sum of the motor pattern and the speed deviation ΔV to produce a corrected motor pattern P. The adder (63) generates .

In this case, the normally open contact (30c) that generates the operating signal is
It is designed to be closed after the start command and real car speed signal (60a) are output until the stop command is output.

Also, a deceleration command signal (9a) and a stop command signal (10a)
can be calculated from the travel distance obtained by integrating the actual car speed signal (60a>), so the deceleration command switch (9) and stop command switch (10) of the hoistway (1) are omitted. Good too.

In FIG. 3 showing each pattern waveform, (a) is an electric motor pattern obtained by adding the ascending travel pattern and the bias pattern (broken line) as in the past, and (b) is the hydraulic pump (12
) Actual leakage pattern (Actual 1!>,
(e) shows the car speed pattern error (broken line) due to the conventional electric motor pattern when the leakage amount fluctuates and the car speed pattern (solid line) due to the actual car speed feedback control; (d) shows the correction with the conventional electric motor pattern (dashed line) Electric motor pattern (solid line)
It is.

Next, with reference to the pattern waveform diagram in FIG. 3, the operation of one embodiment of the present invention shown in FIGS. 1 and 2 will be explained. do not.

If the leakage amount of the hydraulic pump (12) is constant regardless of the rotation speed, as shown in FIGS. 8(a) to (d), the running pattern and (a) car speed pattern (d) Since they match, the desired control can be achieved without performing control based on the feedback of the actual car speed signal (60a). Therefore, using the same upward running pattern as in the past as shown in Fig. 3 (&) Good too.

However, as shown in FIG. 3(b), the actual leakage I pattern (solid line) with respect to the rotation speed of the hydraulic pump (12) is not constant like the bias pattern (dashed line), but during high-speed rotation (in this case, At this time, based on the motor pattern (a), the electric fi (13
), a constant bias pattern (Fig. 3(b)
) broken line), additional pressure oil (3) will be supplied to the cylinder <2). Therefore, the car speed pattern becomes higher than the intended car speed pattern (solid line) by the speed deviation ΔV, as shown by the broken line in FIG. 3(c).

Therefore, the speed detection device (60) feeds back the real car speed signal (Boa) of the car (5) to the speed control device (25A) to generate a corrected motor pattern P by real car speed feedback control.

That is, the actual car speed signal (60m) is converted to the conversion circuit (61).
After the level is converted in , a subtracter (6Z) calculates the deviation from the upward running pattern from the upward running pattern generating circuit (41, U), for example, to obtain a speed deviation ΔV.

This speed deviation ΔV is added to the motor pattern output from the adder (46) in an adder (63) to form a corrected motor pattern P.

At this time, since the fed-back actual car speed signal (Boa) is larger than the upward traveling pattern, the speed deviation ΔV becomes a negative value, and the corrected motor pattern P is changed as shown by the solid line in FIG. 3(d) before correction. This is a pattern that is reduced by an amount corresponding to the speed deviation ΔV from the motor pattern of . Therefore, the car speed pattern has a waveform that matches the upward travel pattern, as shown by the solid line in FIG. 3(6). The same applies to the descending travel pattern during descent.

In this way, by feeding back the actual car speed signal (Boa), a corrected motor pattern P that cancels out the speed deviation ΔV is created.
is obtained, the car speed pattern can be matched with the running pattern, and disturbances during running can be corrected with a quick response.

However, in the method of correcting the amount of leakage using a bias pattern, if the discharge pressure of the hydraulic pump (12) and the load pressure on the cylinder (2) side are not perfectly balanced, the car (5) will move slightly. [2. If a large actual car speed signal (60a) is fed back to a small motor pattern such as a bias pattern, the motor pattern will become close to zero, and hunting may occur in some cases. It will happen.

Figure 4 shows, for example, when correcting leakage 1 using a bias pattern (
These are pattern waveform diagrams when the car (5) vibrates from tO to t, where (a) is a normal motor pattern, (b) is a car speed pattern during vibration, and (c) is a car speed pattern (
(b) is the corrected motor pattern in response to (d) is the car speed pattern due to the corrected motor pattern (c).

The bias pattern generated as the motor pattern (a) from time LO to t1 balances the discharge pressure of the hydraulic pump (12) and the pressure on the cylinder (2) side.

Now, suppose that the car (5) moves with a slight vibration due to a slight difference in balance or the movement of passengers inside the car (5).
The real car speed signal (60m) is the speed control device (25A)
is fed back to ΔV via a subtracter (62), and is input to an adder (63). At this time, since the running pattern has not started up, the corrected motor pattern P is the fourth one.
As shown in Figure CC>, the waveform is obtained by subtracting the car speed pattern (b) from the bias pattern.

In this case, especially in the interval from time t& to tb, the corrected motor pattern P decreases to near zero speed. Therefore, due to the characteristics of the hydraulic pump (12), the balance between the amount of leakage and the cylinder pressure is lost, and the car (5) falls as shown in Fig. 4 (cl>) due to the amount of leakage.In other words, the actual car speed By feedback control of the signal (Boa), the corrected motor pattern P
is over-corrected, causing unnecessary vibrations called hunting. Further, depending on the timing of the change in the car speed pattern (b), the change in the corrected motor pattern P becomes large, causing a shock and worsening the riding comfort.

Although the diagram is shown enlarged here, the actual level of the bias pattern is 1% relative to the car speed during normal running.
5%, and it is clear that if the corrected motor pattern P fluctuates due to vibration-level car speed fluctuations, the pressure balance will easily collapse, making it difficult to correct the car speed.

On the other hand, if the discharge pressure of the hydraulic pump (1Z) and the load pressure on the cylinder (2) side are balanced to some extent, shock at startup will hardly occur.
In order to prevent the shock at the time of starting, it is sufficient to balance the pressure at the time of starting, and the speed control of cage 5) is unnecessary when the cage is running.

Therefore, while the leakage amount before car running is being corrected using the bias pattern, the actual car speed signal (60 m) is not fed back, and the feedback control using the actual car speed signal is performed when switching to the actual running pattern. It is recommended to enable it.

Hereinafter, another embodiment of the present invention aimed at preventing punching during bias pattern correction will be described.

FIG. 5 is a block diagram showing the functions of a speed control device according to another embodiment of the present invention. In the figure, a delay circuit (40) includes a relay ( 70) is connected. Also, speed deviation Δ
A delay circuit (40) is provided between the subtracter (62) that generates V and the adder (63) that generates the corrected motor pattern P.
A switching means, that is, a normally open contact (70a) is inserted, which is closed by excitation of the relay (70) at the output timing, that is, at the start-up timing of the running pattern.

According to the configuration shown in FIG. 5, when the operation command is output via the delay circuit (40), the relay (70) is energized (energized) and the normally open contact (70m) is closed, causing the actual operation to take place. Feedback control of the car speed signal (60a) becomes effective. Therefore, when correcting the leakage amount using only the bias pattern, the actual car speed signal (60a)
Boa) is not fed back, and feedback control is performed only for motor patterns that are sufficiently large compared to the bias pattern. As a result, during the initial O bias pattern correction, hunting does not occur even if the car (5) vibrates slightly, and the car (5) can be started smoothly according to the subsequent running pattern.

[Effects of the Invention] As described above, according to the present invention, there is provided a speed detection device that detects the actual speed of a car and outputs an actual car speed signal, and a speed deviation by subtracting the actual car speed signal from the motor pattern. A subtractor is provided to generate a motor pattern, and an adder is provided to add a speed deviation to the motor pattern to generate a corrected motor pattern, so that the motor pattern is corrected by the speed deviation obtained by feeding back the actual cage speed signal. Therefore, it is possible to obtain a hydraulic elevator control device that can control the motor rotation speed, that is, the car speed with high precision.

According to another aspect of the present invention, the rise timing of the running pattern is provided between the subtracter that generates a speed deviation obtained by subtracting the actual car speed from the running pattern and the adder that generates the corrected motor pattern. When the bias pattern is used to correct the leakage amount, feedback of the actual car speed signal is disabled and only load (torque) control is performed, and when the running pattern starts, the actual car speed signal is Since the control is switched to feedback control, it is possible to realize even more precise control, and there is an effect that a hydraulic elevator control device that can prevent hunting and perform smooth startup can be obtained.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an embodiment of this invention, FIG. 2 is a block diagram showing the functions of the speed control device in FIG. 1, and FIG. 3 is for explaining the operation of an embodiment of this invention. FIG. 4 is a pattern waveform diagram for explaining hunting according to one embodiment of the present invention, and FIG. 5 is a block diagram showing the functions of a speed control device according to another embodiment of the present invention. , FIG. 6 is a configuration diagram showing a conventional hydraulic elevator control device, FIG. 7 is a block diagram showing the functions of a conventional speed control device, and FIG. 8 is a pattern for explaining the operation of a conventional hydraulic elevator control device. FIG. -(2)...Cylinder (3>...Pressure oil (5)
)...Car (12>...Hydraulic pump (
13)...Electric motor (20)...Inverter circuit (60)...Speed detection device (60a)...Real car speed signal (62)...Subtractor (63)...Adder ( 70a)...Normally open contact (switching means) ΔV・
...Speed deviation P...Correction motor pattern In the drawings, the same reference numerals indicate the same or corresponding parts.

Claims (2)

[Claims] (1) A cylinder that raises and lowers the car, a hydraulic pump that sends and receives pressure oil to this cylinder, an electric motor that drives this hydraulic pump, a pattern generator that generates a motor pattern for driving this electric motor, and the car. a speed detection device that detects the actual speed of the motor and outputs a real car speed signal; a subtractor that subtracts the real car speed signal from the motor pattern to generate a speed deviation; A hydraulic elevator control device comprising: an adder that performs addition to generate a corrected motor pattern. (2) The electric motor pattern consists of the sum of the bias pattern for correcting the leakage amount of the hydraulic pump and the running pattern for running the car, and the subtractor subtracts the actual car speed signal from the running pattern to speed up the car. Hydraulic elevator control according to claim 1, characterized in that a deviation is output and a switching means is inserted between the subtracter and the adder, the switching means being closed according to the rise timing of the travel pattern. Device.