CN112431779A - Rotation control method and system of server fan - Google Patents
Rotation control method and system of server fan Download PDFInfo
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- CN112431779A CN112431779A CN202011228909.4A CN202011228909A CN112431779A CN 112431779 A CN112431779 A CN 112431779A CN 202011228909 A CN202011228909 A CN 202011228909A CN 112431779 A CN112431779 A CN 112431779A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
- F04D27/004—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids by varying driving speed
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Abstract
The invention discloses a rotation control method and a system of a server fan, wherein the rotation control method of the server fan comprises the following steps: acquiring the external voltage and the induced voltage of the server fan, and calculating to obtain the fan current of the server fan by using the external voltage and the induced voltage and combining the armature constant of the server fan; calculating the electromagnetic torque of the server fan according to the relationship between the fan current and the electromagnetic torque of the server fan; acquiring the load torque of the server fan, and calculating to obtain the mechanical rotating speed of a motor of the server fan by using the electromagnetic torque and the load torque; and controlling the server fan to rotate according to the relation between the mechanical rotating speed of the motor and the rotating position of the server fan. The technical scheme of the invention can solve the problems of long rotating speed adjusting time, low efficiency and poor heat dissipation effect in the prior art.
Description
Technical Field
The invention relates to the technical field of cloud computing, in particular to a rotation control method and system for a server fan.
Background
As one kind of computer equipment, a server can provide services such as computation, storage, data exchange and the like for internet users, and is an important component node in the internet era. The server mainly comprises electronic devices such as a circuit board, a central processing unit, a memory, a chip set and the like, and has high operation rate, long operation time and larger data throughput, so that the server can emit a large amount of heat energy during operation.
If the server generates heat for too long or too much heat, the function of the server is easily damaged. In order to solve the problem of heat generation of the server, one or more server fans are usually built in the server, and the heat generated by the server is released by the rotation of the fan blades. In order to realize the rotation control of the server fan, a baseboard management controller BMC is usually arranged in the prior art, and a pulse width modulation signal PWM is directly output to a motor of the server fan through the BMC, so that the rotating speed of the fan is changed, and the heat dissipation effect on the server is achieved. However, for controlling the heat dissipation effect of the server, the temperature sensor is usually used for feedback adjustment, and specifically, the BMC changes the duty ratio of the output pulse width modulation signal PWM according to the temperature fed back by the temperature sensor, so as to adjust the fan speed of the server.
However, in the above-mentioned method for adjusting and controlling the server fan, the adjustment time of the rotation speed of the server fan is delayed, which results in poor heat dissipation effect of the server.
Disclosure of Invention
The invention provides a rotation control method and a rotation control system for a server fan, and aims to solve the problems that in the prior art, the rotating speed of the server fan is long in adjusting time, low in adjusting efficiency and poor in heat dissipation effect.
To achieve the above object, according to a first aspect of the present invention, there is provided a rotation control method of a server fan, including:
acquiring the external voltage and the induced voltage of the server fan, and calculating to obtain the fan current of the server fan by using the external voltage and the induced voltage and combining the armature constant of the server fan;
calculating the electromagnetic torque of the server fan according to the relationship between the fan current and the electromagnetic torque of the server fan;
acquiring the load torque of the server fan, and calculating to obtain the mechanical rotating speed of a motor of the server fan by using the electromagnetic torque and the load torque;
and controlling the server fan to rotate according to the relation between the mechanical rotating speed of the motor and the rotating position of the server fan.
Preferably, the step of obtaining the induced voltage of the server fan includes:
feeding back to obtain the mechanical rotating speed of the motor of the server fan;
using the motor mechanical speed and the server fan potential coefficient, according to the formula: ea＝KeOmega, calculating to obtain the induced voltage of the server fan; wherein,
Eais the induced voltage of the server fan, KeAnd omega is the mechanical rotating speed of the motor of the server fan.
Preferably, the step of calculating the fan current of the server fan by using the applied voltage and the induced voltage in combination with the armature constant of the server fan includes:
using the applied and induced voltages of the server fan, and the armature resistance and armature inductance of the server fan, according to the formula:
calculating to obtain the fan current of the server fan; wherein,
Udfor an applied voltage of the server fan, EaIs the induced voltage of the server fan, RaIs the armature resistance of the server fan, LaIs the armature inductance, tau, of the server fana＝La/RaIs the armature time constant of the server fan.
Preferably, the step of calculating the mechanical rotation speed of the motor of the server fan by using the electromagnetic torque and the load torque includes:
using the electromagnetic torque and the load torque, according to the formula:
and
calculating to obtain the mechanical rotating speed of a motor of the server fan; wherein,
Tebeing server fansElectromagnetic torque, TlIs the load torque of the server fan, B is the damping coefficient of the server fan, J is the moment of inertia of the server fan, τmJ/B is the rotational constant of the server fan and ω is the electromechanical rotational speed of the server fan.
Preferably, the step of controlling the rotation of the server fan according to the relationship between the mechanical rotation speed of the motor and the rotation position of the server fan includes:
using the mechanical rotational speed of the motor and the rotational position of the server fan, according to the formula:
calculating to obtain the rotation time required by adjusting the rotation position of the server fan; wherein,
x is the rotation position of the server fan, omega is the mechanical rotation speed of a motor of the server fan, and t is the rotation time of the server fan;
and adjusting the rotation time of the server fan to the rotation time required for adjusting the rotation position of the server fan.
According to a second aspect of the present invention, there is also provided a rotation control system of a server fan, comprising:
the voltage acquisition module is used for acquiring the external voltage and the induced voltage of the server fan;
the current calculation module is used for calculating and obtaining the fan current of the server fan by using the external voltage and the induction voltage and combining the armature constant of the server fan;
the torque calculation module is used for calculating the electromagnetic torque of the server fan according to the relation between the fan current and the electromagnetic torque of the server fan;
the rotating speed calculation module is used for acquiring the load torque of the server fan, and calculating the mechanical rotating speed of the motor of the server fan by using the electromagnetic torque and the load torque;
and the rotation control module is used for controlling the server fan to rotate according to the relation between the mechanical rotating speed of the motor and the rotating position of the server fan.
Preferably, the voltage acquisition module includes:
the rotating speed obtaining submodule is used for feeding back and obtaining the mechanical rotating speed of the motor of the server fan;
and the voltage calculation submodule is used for using the mechanical rotating speed of the motor and the potential coefficient of the server fan, and according to the formula: ea＝KeOmega, calculating to obtain the induced voltage of the server fan; wherein,
Eais the induced voltage of the server fan, KeAnd omega is the mechanical rotating speed of the motor of the server fan.
Preferably, the current calculation module is specifically configured to use an applied voltage and an induced voltage of the server fan, and an armature resistance and an armature inductance of the server fan, according to a formula:
calculating to obtain the fan current of the server fan; wherein,
Udfor an applied voltage of the server fan, EaIs the induced voltage of the server fan, RaIs the armature resistance of the server fan, LaIs the armature inductance, tau, of the server fana＝La/RaIs the armature time constant of the server fan.
Preferably, the rotational speed calculation module, in particular for using an electromagnetic torque and a load torque, is adapted to:
calculating to obtain the mechanical rotating speed of a motor of the server fan; wherein,
Teis the electromagnetic torque of the server fan, TlIs the load torque of the server fan, B is the damping coefficient of the server fan, J is the moment of inertia of the server fan, τmJ/B is the rotational constant of the server fan and ω is the electromechanical rotational speed of the server fan.
Preferably, the rotation control module includes:
time of rotationA calculation submodule for using the mechanical speed of the motor and the rotational position of the server fan, according to the formula:
calculating to obtain the rotation time required by adjusting the rotation position of the server fan; wherein,
x is the rotation position of the server fan, omega is the mechanical rotation speed of a motor of the server fan, and t is the rotation time of the server fan;
and the rotation time adjusting submodule is used for adjusting the rotation time of the server fan to the rotation time required by adjusting the rotation position of the server fan.
In summary, according to the rotation control scheme of the server fan provided by the application, the fan current of the server fan is calculated by using the applied voltage and the induced voltage of the server fan and combining the armature constant of the server fan, and the electromagnetic torque of the server fan is calculated according to the relationship between the fan current and the electromagnetic torque; the electromagnetic torque is combined with the load torque to calculate the mechanical rotating speed of the motor of the server fan, so that the server fan can be controlled to rotate according to the mechanical rotating speed of the motor. Compare in current calculation only through the duty cycle of the pulse width modulation signal PWM that BMC changed output, carry out the scheme that the rotational speed was adjusted to the server fan, this scheme can directly carry out the regulation of motor machinery rotational speed according to the voltage of server fan to direct control server fan rotates, and the rotational speed regulation time that can solve the server fan among the prior art is longer, and the regulation efficiency is lower, the relatively poor problem of radiating effect.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
Fig. 1 is a schematic diagram of an equivalent circuit structure of a server fan according to an embodiment of the present invention;
FIG. 2 is a mathematical model diagram of a DC motor of a server fan according to an embodiment of the present invention;
fig. 3 is a flowchart illustrating a method for controlling rotation of a server fan according to an embodiment of the present invention;
FIG. 4 is a flowchart illustrating an induced voltage obtaining method for a server fan according to the embodiment shown in FIG. 3;
FIG. 5 is a flowchart illustrating a method for controlling the rotation of a server fan according to the embodiment shown in FIG. 3;
FIG. 6 is a schematic structural diagram of a system for controlling the rotation of a server fan according to an embodiment of the present invention;
FIG. 7 is a schematic structural diagram of a voltage acquisition module provided in the embodiment shown in FIG. 6;
fig. 8 is a schematic structural diagram of a rotation control module provided in the embodiment shown in fig. 6.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The main technical problems of the embodiment of the invention are as follows:
in the existing calculation, a BMC is usually arranged, and a pulse width modulation signal PWM is directly output to a motor of a server fan through the BMC to change the rotating speed of the fan, so that the heat dissipation effect on the server is achieved. However, for controlling the heat dissipation effect of the server, the temperature sensor is usually used for feedback adjustment, and specifically, the BMC changes the duty ratio of the output pulse width modulation signal PWM according to the temperature fed back by the temperature sensor, so as to adjust the fan speed of the server. However, in this method for adjusting and controlling the server fan, the adjustment time of the rotation speed of the server fan is delayed, which results in poor heat dissipation effect of the server.
To solve the above problem, as shown in fig. 1, an equivalent circuit structure of a server fan generally includes: the external voltage source, namely, the dc motor Ua, the armature resistor Ra, the armature inductor La and the fan, where the induced voltage of the fan is Ea, and as can be seen from the circuit structure of the server fan shown in fig. 1, under the condition of rated excitation, the voltage balance relation of the dc motor is as follows:
The induction voltage E of the server fan can be obtained by the formulaaBy the induced voltage EaAnd combining other parameters to obtain the mechanical rotating speed of the motor of the server fan, so as to control the rotation of the server fan according to the mechanical rotating speed of the motor of the server fan.
Referring to fig. 2, fig. 2 is a mathematical model diagram of a dc motor of a server fan according to an embodiment of the present disclosure. As can be known from the mathematical model of the dc motor of the server fan, the fan current of the motor of the server fan can be calculated by obtaining the applied voltage u of the server fan and combining the original feedback mechanical rotational speed ω of the motor of the server fan. And then the electromagnetic torque is obtained through the calculation of the fan current, and the mechanical rotating speed of the motor of the server fan can be obtained by combining the load torque of the server fan.
Referring to fig. 3, fig. 3 is a schematic flowchart of a method for controlling rotation of a server fan according to an embodiment of the present invention. As shown in fig. 3, the method for controlling the rotation of the server fan includes the steps of:
s110: acquiring an external voltage and an induced voltage of a server fan; wherein, the external voltage U of the server fana(i.e., u in FIG. 2) can be measured by a sensor, shown in connection with FIG. 1, to induce a voltage EaIs the voltage fed back by the server fan motor.
Specifically, referring to fig. 4, the step of obtaining the induced voltage of the server fan includes:
s111: and feeding back to obtain the mechanical rotating speed of the motor of the server fan. The motor mechanical rotation speed ω is a quantity to be calculated and adjusted, and the motor torque of the server fan can be fed back through the motor mechanical rotation speed ω, so that the induced voltage of the server fan is reversely deduced according to the motor torque of the server fan.
S112: using the motor mechanical speed and the server fan potential coefficient, according to the formula: ea＝KeOmega, calculating to obtain the induced voltage of the server fan; wherein,
Eais the induced voltage of the server fan, KeAnd omega is the mechanical rotating speed of the motor of the server fan.
In the embodiment of the application, the mechanical rotating speed of the motor of the server fan is obtained through feedback, then the induced voltage of the server fan can be obtained through calculation by using the mechanical rotating speed of the motor and the potential system of the server fan, and then other variables of the server fan are calculated according to the relation between the induced voltage and the external voltage, so that the rotation condition of the server fan is adjusted.
The embodiment shown in fig. 3 further comprises the following steps:
s120: and calculating the fan current of the server fan by using the external voltage and the induced voltage and combining the armature constant of the server fan.
Specifically, the step of calculating the fan current of the server fan by using the applied voltage and the induced voltage in combination with the armature constant of the server fan includes:
using the applied and induced voltages of the server fan, and the armature resistance and armature inductance of the server fan, according to the formula:
calculating to obtain the fan current of the server fan; wherein,
Udfor an applied voltage of the server fan, EaIs the induced voltage of the server fan, RaIs the armature resistance of the server fan, LaIs the armature inductance, tau, of the server fana＝La/RaIs the armature time constant of the server fan.
Formula (II)
Is to
S is a laplacian operator, and the applied voltage U of the server fan is determined according to the formuladAnd an induced voltage EaAnd armature resistance R of server fanaAnd armature inductance LaThen, the fan current i of the server fan can be calculatedaOr Ia(s)。
S130: calculating the electromagnetic torque of the server fan according to the relationship between the fan current and the electromagnetic torque of the server fan;
the electromagnetic torque of the server fan is equal to the product of the armature current and the torque coefficient, and the specific calculation formula is as follows:
Te＝Kmiawherein, TeRepresenting the electromagnetic torque of the server fan motor, iaThe fan current, which represents the server fan, has been calculated through the above-mentioned step S120, KmThe torque coefficient of the server fan is obtained, so that after the fan current of the server fan is confirmed, the electromagnetic torque of the server fan can be calculated through the product of the fan current and the torque coefficient.
S140: acquiring the load torque of the server fan, and calculating to obtain the mechanical rotating speed of a motor of the server fan by using the electromagnetic torque and the load torque;
the step of calculating the mechanical rotating speed of the motor of the server fan by using the electromagnetic torque and the load torque specifically comprises the following steps:
using the electromagnetic torque and the load torque, according to the formula:
and
calculating to obtain the mechanical rotating speed of a motor of the server fan; wherein,
Teis the electromagnetic torque of the server fan, TlIs the load torque of the server fan, B is the damping coefficient of the server fan, J is the moment of inertia of the server fan, τmJ/B is the rotational constant of the server fan and ω is the electromechanical rotational speed of the server fan.
Wherein, the formula
Is to formula
After the electromagnetic torque of the server fan is known and the load torque of the server fan is obtained through the above formula, because the damping coefficient B and the moment of inertia J of the server fan are both known, the motor mechanical rotation speed ω of the server fan can be calculated through the above formula by using the electromagnetic torque and the load torque.
S150: and controlling the server fan to rotate according to the mechanical rotating speed of the motor.
Specifically, as shown in fig. 5, the step of controlling the server fan to rotate according to the mechanical rotation speed of the motor is as follows:
s151: using the mechanical rotational speed of the motor and the rotational position of the server fan, according to the formula:
calculating to obtain the rotation time required by adjusting the rotation position of the server fan; wherein,
x is the rotation position of the server fan, omega is the mechanical rotation speed of the motor of the server fan, and t is the rotation time of the server fan.
S152: and adjusting the rotation time of the server fan to the rotation time required for adjusting the rotation position of the server fan.
Since the mechanical rotational speed of the motor of the server fan has been calculated, the rotational position of the server fan can be calculated in combination with the rotational time of the server fan, and the server fan can be adjusted to this position by the rotational position of the server fan, thereby maintaining rotational control of the server fan.
In summary, according to the rotation control method of the server fan provided by the application, the fan current of the server fan is calculated by using the applied voltage and the induced voltage of the server fan and combining the armature constant of the server fan, and the electromagnetic torque of the server fan is calculated according to the relationship between the fan current and the electromagnetic torque; the electromagnetic torque is combined with the load torque to calculate the mechanical rotating speed of the motor of the server fan, so that the server fan can be controlled to rotate according to the mechanical rotating speed of the motor. Compare in current calculation only through the duty cycle of the pulse width modulation signal PWM that BMC changed output, carry out the scheme that the rotational speed was adjusted to the server fan, this scheme can directly carry out the regulation of motor machinery rotational speed according to the voltage of server fan to direct control server fan rotates, and the rotational speed regulation time that can solve the server fan among the prior art is longer, and the regulation efficiency is lower, the relatively poor problem of radiating effect.
In addition, based on the same concept of the above method embodiment, the embodiment of the present invention further provides a rotation control system of a server fan, which is used for implementing the above method of the present invention, and since the principle of solving the problem of the embodiment of the system is similar to that of the above method, at least all the beneficial effects brought by the technical solution of the above embodiment are achieved, and no further description is given here.
Referring to fig. 6, fig. 6 is a schematic structural diagram of a rotation control system of a server fan according to an embodiment of the present invention. As shown in fig. 6, the rotation control system of the server fan includes:
a voltage obtaining module 110, configured to obtain an applied voltage and an induced voltage of the server fan;
the current calculation module 120 is configured to calculate a fan current of the server fan by using the applied voltage and the induced voltage in combination with an armature constant of the server fan;
the torque calculation module 130 is configured to calculate an electromagnetic torque of the server fan according to a relationship between the fan current and the electromagnetic torque of the server fan;
the rotating speed calculation module 140 is configured to obtain a load torque of the server fan, and calculate a mechanical rotating speed of a motor of the server fan by using the electromagnetic torque and the load torque;
and the rotation control module 150 is used for controlling the server fan to rotate according to the relationship between the mechanical rotation speed of the motor and the rotation position of the server fan.
In summary, in the rotation control system of the server fan provided by the present application, the voltage obtaining module 110 obtains the external elegant and induced voltage of the server fan, and then the current calculating module 120 calculates the fan current of the server fan by using the external voltage and the induced voltage of the server fan and combining the armature constant of the server fan; then, the electromagnetic torque of the server fan is calculated and obtained through the torque calculation module 130 according to the relationship between the fan current and the electromagnetic torque; the electromagnetic torque is then used by the rotational speed calculation module 140 in combination with the load torque to calculate the mechanical rotational speed of the server fan, so that the rotation of the server fan can be controlled by the rotation control module 150 according to the mechanical rotational speed of the motor. Compare in current calculation only through the duty cycle of the pulse width modulation signal PWM that BMC changed output, carry out the scheme that the rotational speed was adjusted to the server fan, this scheme can directly carry out the regulation of motor machinery rotational speed according to the voltage of server fan to direct control server fan rotates, and the rotational speed regulation time that can solve the server fan among the prior art is longer, and the regulation efficiency is lower, the relatively poor problem of radiating effect.
As shown in fig. 7, the voltage obtaining module 110 includes:
the rotating speed obtaining submodule 111 is used for feeding back and obtaining the mechanical rotating speed of the motor of the server fan;
a voltage calculation submodule 112 for using the motor mechanical speed and the server fan potential coefficient, according to the formula: ea＝KeOmega, calculating to obtain the induced voltage of the server fan; wherein,
Eais the induced voltage of the server fan, KeAnd omega is the mechanical rotating speed of the motor of the server fan.
The current calculating module 120 is specifically configured to use an applied voltage and an induced voltage of the server fan, and an armature resistance and an armature inductance of the server fan, according to a formula:
calculating to obtain the fan current of the server fan; wherein,
Udfor an applied voltage of the server fan, EaIs the induced voltage of the server fan, RaIs the armature resistance of the server fan, LaIs the armature inductance, tau, of the server fana＝La/RaIs the armature time constant of the server fan.
The rotation speed calculation module 140 is specifically configured to use an electromagnetic torque and a load torque, according to a formula:
calculating to obtain the mechanical rotating speed of a motor of the server fan; wherein,
Teis the electromagnetic torque of the server fan, TlIs the load torque of the server fan, B is the damping coefficient of the server fan, J is the moment of inertia of the server fan, τmJ/B is the rotational constant of the server fan and ω is the electromechanical rotational speed of the server fan.
As shown in fig. 8, the rotation control module 150 includes:
a rotation time calculation submodule 151 for calculating a rotation time of the server fan using the mechanical rotation speed of the motor and the rotation position of the server fan according to the formula:
calculating to obtain the rotation time required by adjusting the rotation position of the server fan; wherein,
x is the rotation position of the server fan, omega is the mechanical rotation speed of a motor of the server fan, and t is the rotation time of the server fan;
the rotation time adjustment sub-module 152 adjusts the rotation time of the server fan to a rotation time required for adjusting the rotational position of the server fan.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
It should be noted that in the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word "comprising" does not exclude the presence of elements or steps not listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The invention may be implemented by means of hardware comprising several distinct elements, and by means of a suitably programmed computer. In the unit claims enumerating several means, several of these means may be embodied by one and the same item of hardware. The usage of the words first, second and third, etcetera do not indicate any ordering. These words may be interpreted as names.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (10)
1. A method for controlling rotation of a server fan, comprising:
acquiring the external voltage and the induced voltage of the server fan, and calculating to obtain the fan current of the server fan by using the external voltage and the induced voltage and combining the armature constant of the server fan;
calculating the electromagnetic torque of the server fan according to the relationship between the fan current and the electromagnetic torque of the server fan;
acquiring the load torque of the server fan, and calculating to obtain the mechanical rotating speed of a motor of the server fan by using the electromagnetic torque and the load torque;
and controlling the server fan to rotate according to the mechanical rotating speed of the motor.
2. The method of claim 1, wherein the step of obtaining the induced voltage of the server fan comprises:
feeding back to obtain the mechanical rotating speed of the motor of the server fan;
using the motor mechanical speed and the server fan potential coefficient, according to a formula: ea＝KeOmega, calculating to obtain the induced voltage of the server fan; wherein,
Eais the induced voltage of the server fan, KeAnd omega is the potential coefficient of the server fan and the mechanical rotating speed of the motor of the server fan.
3. The method for controlling rotation of a server fan according to claim 1 or 2, wherein the step of calculating a fan current of the server fan using the applied voltage and the induced voltage in combination with an armature constant of the server fan includes:
using the applied and induced voltages of the server fan, and the armature resistance and armature inductance of the server fan, according to a formula:
and
calculating to obtain the fan current of the server fan; wherein,
Udis an applied voltage of the server fan, EaIs an induced voltage, R, of the server fanaIs the armature resistance, L, of the server fanaIs the armature inductance, τ, of the server fana＝La/RaIs the armature time constant of the server fan.
4. The method for controlling rotation of a server fan according to claim 1, wherein the step of calculating a mechanical rotational speed of a motor of the server fan using the electromagnetic torque and the load torque includes:
using the electromagnetic torque and the load torque, according to the formula:
and
calculating to obtain the mechanical rotating speed of the motor of the server fan; wherein,
Teis the electromagnetic torque of the server fan, TlIs the load torque of the server fan, B is the damping coefficient of the server fan, J is the moment of inertia of the server fan, τmJ/B is a rotational constant of the server fan, and ω is a electromechanical rotational speed of the server fan.
5. The method of claim 1, wherein the step of controlling the rotation of the server fan according to the mechanical rotation speed of the motor comprises:
using the mechanical rotational speed of the motor and the rotational position of the server fan, according to the formula:
calculating to obtain rotation time required for adjusting the rotation position of the server fan; wherein,
x is the rotation position of the server fan, omega is the mechanical rotation speed of a motor of the server fan, and t is the rotation time of the server fan;
and adjusting the rotation time of the server fan to the rotation time required for adjusting the rotation position of the server fan.
6. A rotation control system of a server fan, comprising:
the voltage acquisition module is used for acquiring the external voltage and the induced voltage of the server fan;
the current calculation module is used for calculating the fan current of the server fan by using the external voltage and the induction voltage and combining the armature constant of the server fan;
the torque calculation module is used for calculating the electromagnetic torque of the server fan according to the relation between the fan current and the electromagnetic torque of the server fan;
the rotating speed calculation module is used for acquiring the load torque of the server fan and calculating the mechanical rotating speed of the motor of the server fan by using the electromagnetic torque and the load torque;
and the rotation control module is used for controlling the server fan to rotate according to the mechanical rotating speed of the motor.
7. The system of claim 6, wherein the voltage acquisition module comprises:
the rotating speed obtaining submodule is used for obtaining the mechanical rotating speed of the motor of the server fan through feedback;
a voltage calculation submodule, configured to use the mechanical rotational speed of the motor and a potential coefficient of the server fan, according to a formula: ea＝KeOmega, the induction of the server fan is obtained by calculationA voltage; wherein,
Eais the induced voltage of the server fan, KeAnd omega is the potential coefficient of the server fan and the mechanical rotating speed of the motor of the server fan.
8. The system according to claim 6 or 7, wherein the current calculation module is specifically configured to use the applied voltage and the induced voltage of the server fan, and the armature resistance and the armature inductance of the server fan, according to the formula:
and
calculating to obtain the fan current of the server fan; wherein,
Udis an applied voltage of the server fan, EaIs an induced voltage, R, of the server fanaIs the armature resistance, L, of the server fanaIs the armature inductance, τ, of the server fana＝La/RaIs the armature time constant of the server fan.
9. The system of claim 6, wherein the rotational speed calculation module is specifically configured to use the electromagnetic torque and the load torque according to the formula:
and
calculating to obtain the mechanical rotating speed of the motor of the server fan; wherein,
Teis the electromagnetic torque of the server fan, TlIs the load torque of the server fan, B is the serviceDamping coefficient of the server fan, J is the moment of inertia of the server fan, τmJ/B is a rotational constant of the server fan, and ω is a electromechanical rotational speed of the server fan.
10. The rotational control system of a server fan as set forth in claim 6, wherein said rotational control module comprises:
a rotation time calculation submodule for using the mechanical rotation speed of the motor and the rotation position of the server fan according to a formula:
calculating to obtain rotation time required for adjusting the rotation position of the server fan; wherein,
x is the rotation position of the server fan, omega is the mechanical rotation speed of a motor of the server fan, and t is the rotation time of the server fan;
and the rotation time adjusting submodule is used for adjusting the rotation time of the server fan to the rotation time required by adjusting the rotation position of the server fan.
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| CN202011228909.4A CN112431779A (en) | 2020-11-06 | 2020-11-06 | Rotation control method and system of server fan |
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| CN202011228909.4A CN112431779A (en) | 2020-11-06 | 2020-11-06 | Rotation control method and system of server fan |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103016381A (en) * | 2012-12-12 | 2013-04-03 | 曙光信息产业股份有限公司 | Fan speed-regulating system for server |
| CN106533299A (en) * | 2016-12-27 | 2017-03-22 | 山东大学 | Servo control strategy and system for simultaneously eliminating counter potential and load torque disturbance |
| CN111090319A (en) * | 2019-11-21 | 2020-05-01 | 苏州浪潮智能科技有限公司 | Method, device and medium for controlling server fan based on thermistor |
| CN112052558A (en) * | 2020-07-29 | 2020-12-08 | 苏州浪潮智能科技有限公司 | Method for optimizing server fan control |
-
2020
- 2020-11-06 CN CN202011228909.4A patent/CN112431779A/en not_active Withdrawn
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103016381A (en) * | 2012-12-12 | 2013-04-03 | 曙光信息产业股份有限公司 | Fan speed-regulating system for server |
| CN106533299A (en) * | 2016-12-27 | 2017-03-22 | 山东大学 | Servo control strategy and system for simultaneously eliminating counter potential and load torque disturbance |
| CN111090319A (en) * | 2019-11-21 | 2020-05-01 | 苏州浪潮智能科技有限公司 | Method, device and medium for controlling server fan based on thermistor |
| CN112052558A (en) * | 2020-07-29 | 2020-12-08 | 苏州浪潮智能科技有限公司 | Method for optimizing server fan control |
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