US 11,817,801 B2Granted

Motor speed controller and speed control system

AssigneeJohnson Controls Tyco IP Holdings LLP

InventorsMenghua Hu, Jinbao Li, Yufeng Zhou, Shuqing Wang, Zuolin Ren

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Abstract

An electric motor speed controller includes a processor connected to the following terminals, a base voltage terminal receiving a base voltage, a first voltage terminal provided with a constant voltage, and a second voltage terminal receiving a first motor coil voltage from the processor, and a third voltage terminal receiving a second motor coil voltage from the processor. The processor provides a first control period having the second motor coil voltage be zero and a second control period having the first motor coil voltage be zero. The processor determines the motor speed by controlling a difference between a first time period in the first control period and a second time period in the second control period. The first time period corresponds to a first output voltage increase and the second time period corresponds to a second output voltage increase.

Claims17

Dependent claims

A speed controller for determining and controlling operation speeds of a motor, the speed controller comprising:

a processor operable to send control signals and receive feedback signals;
a base voltage terminal electrically connected to the processor and receiving a base voltage U+;
a first voltage terminal electrically connected to the processor and provided with a constant voltage;
a second voltage terminal electrically connected to the processor and receiving a first motor coil voltage U2 determined by the processor;
and
a third voltage terminal electrically connected to the processor and receiving a second motor coil U3 voltage determined by the processor;
wherein the processor provides a first control period T1 having the second motor coil voltage of the third voltage terminal be zero and a second control period having the first motor coil voltage U2 of the second voltage terminal be zero, and wherein the processor determines a rotation speed of the motor by controlling a value difference between a first time period t1 in the first control period T1 and a second time period t3 in the second control period, the first time period t1 corresponding to a first increase in an output voltage U0 and the second time period t3 corresponding to a second increase in the output voltage U0,
wherein the output voltage Uo, the base voltage U+ constant voltage U1, the first motor coil voltage U2, and the second motor coil voltage U3 satisfy the following relationship:
U
O
=
U
+
+
U
+
C
F
⁢
∫
(
1
R
1
+
1
R
2
+
1
R
3
)
⁢
dt
-
1
C
F
⁢
∫
(
U
1
R
1
+
U
2
R
2
+
U
3
R
3
)
⁢
dt
wherein CF is a value of a capacitor in an amplifier integrator circuit and R1, R2, and R3 are values of respective resistors between the first voltage terminal, the second voltage terminal and the third voltage terminal and the amplifier integrator circuit.

57 more elements

An actuator control system for use with a motor operable to move an actuator, the actuator control system comprising:

a speed controller configured to determine and control a speed of the motor, wherein the speed controller comprises:
a processor configured to send control signals and receive feedback signals;
and
an interface configured to receive a base voltage U+,
provide a constant voltage,
receive a first motor coil voltage U2, and
receive a second motor coil voltage U3 ;
wherein the processor is configured to provide a first control period T1 having the second motor coil voltage U3 be zero and a second control period having the first motor coil voltage be zero, and wherein the processor in configured to determine the speed of the motor by maintaining a constant value difference between a first time period t1 in the first control period T1 and a second time period t3 in the second control period, the first time period t1 corresponding to a first increase in an output voltage U0 and the second time period t3 corresponding to a second increase in the output voltage U0,
wherein the output voltage Uo, the base voltage U+ constant voltage U1, the first motor coil voltage U2, and the second motor coil voltage U3 satisfy the following relationship:
U
O
=
U
+
+
U
+
C
F
⁢
∫
(
1
R
1
+
1
R
2
+
1
R
3
)
⁢
dt
-
1
C
F
⁢
∫
(
U
1
R
1
+
U
2
R
2
+
U
3
R
3
)
⁢
dt
wherein CF is a value of a capacitor in an amplifier integrator circuit and R1, R2, and R3 are values of respective resistors between first voltage terminal, second voltage terminal and third voltage terminal and the amplifier integrator circuit, and wherein the motor is a direct current brush motor and the processor is configured to provide a pulse width modulation signal to drive the motor.

58 more elements

Dependencies are inferred from the claim text.

Facts

Application: 16/726,062Filed 23 Dec 2019
Priority: CN 201822193407.725 Dec 2018
Published: US 2020/0204095 A125 Jun 2020
Granted: 14 Nov 2023
Term ends: Not estimatedThe source records don’t support an estimate.

Classification3 codes

H02P 7/063
For regulating or controlling an individual DC dynamo-electric motor by varying field or armature current: using centrifugal devices, e.g. switch,…
H02P 7/29
Controlling armature supply only: using pulse modulation
H02P
Control or regulation of electric motors, electric generators or dynamo-electric converters