WO2013159458A1

WO2013159458A1 - Motor and constant air volume control method for air-conditioning fan system

Info

Publication number: WO2013159458A1
Application number: PCT/CN2012/078545
Authority: WO
Inventors: 胡戈; 张先胜
Original assignee: 中山大洋电机股份有限公司
Priority date: 2012-04-26
Filing date: 2012-07-12
Publication date: 2013-10-31
Also published as: WO2013159461A1

Abstract

A motor and a constant air volume control method for an air-conditioning fan system. A function relationship Q = F(T, n, V) of the air volume is first established, and multiple moment segments each have a corresponding adjustment coefficient V. A micro processor of a motor controller receives a target air volume Q_ref input from the outside, and starts the motor under a certain moment T, so that the motor enters a stable state. A stable-state rotating speed n at this time is recorded, and an air volume Q_c in the stable state is calculated according to an equation. The target air volume Q_ref is compared with the calculated air volume Q_c; if the target air volume and the calculated air volume are equal or equivalent, the motor maintains the moment in the stable state, and if the target air volume and the calculated air volume are not equal or equivalent, the motor increases or decreases the output moment. After entering the stable state by adjusting the moment, the motor re-records the stable-state rotating speed n under the adjusted moment, calculates the air volume Q_c and compares same with the air volume Q_ref, until Q_c and Q_ref are equal or equivalent, and then the motor enters the stable state. The method has high control accuracy, and is adaptive to a wide static pressure range.

Description

一种电机及空调风机***的恒风量控制方法 Constant air volume control method for motor and air conditioning fan system

技术领域 Technical field

本发明涉及一种电机及空调风机***的恒风量控制方法。 The invention relates to a constant air volume control method for a motor and an air conditioner fan system.

背景技术 Background technique

在家用空调的室内通风管道里，静压往往随着时间的流逝而变化，比如因为管道积灰或者过滤器堵塞。静压也因为管道的安装不同而往往高于厂商实验室的标称***时的标准静压。恒风量控制可以在这些情况下给用户带来恒定的风量，从而在广泛的静压条件下维持舒适的通风，制冷或制热的效果。 In indoor ventilation ducts for household air conditioners, static pressure tends to change over time, for example, due to fouling of the pipeline or clogging of the filter. Static pressure is also often higher than the standard static pressure of the nominal laboratory of the manufacturer's laboratory due to the different installation of the pipe. Constant air volume control provides a constant airflow to the user under these conditions, maintaining comfortable ventilation, cooling or heating under a wide range of static pressure conditions.

为了实现恒风量控制，一些技术方案釆用直接安装风量计，不仅提高成本, 还带来潜在的因为风量计失效导致控制失败的风险。当前空调厂商大多釆用无风量计的恒风量控制方法。 In order to achieve constant air volume control, some technical solutions use direct installation of the air flow meter, which not only increases the cost, but also brings the potential risk of control failure due to the failure of the wind meter. Most of the current air conditioner manufacturers use the constant air volume control method of the airless meter.

另外，一些技术方案要监视静压的变化来调速，如：美国专利 US 4806833 , 通过检测静压来调整转速，达到恒风量的目的。美国专利 US201000298993A1 , 通过直接测量外部静压来决定风量，这需要事先把静压与风量的关系测量出来，电机力矩然后通过在指定风量下对应的静压来计算，监视静压的变化来调速。有的计算公式设计到对数计算或者高阶多项式，这需要电机控制器的微处理器 MCU具有较强大的计算能力，进一步提高了成本。 In addition, some technical solutions should monitor the change of static pressure to adjust the speed, such as: US Patent US 4806833, to adjust the rotational speed by detecting static pressure to achieve the purpose of constant air volume. US patent US201000298993A1, the air volume is determined by directly measuring the external static pressure. This requires measuring the relationship between the static pressure and the air volume in advance. The motor torque is then calculated by the corresponding static pressure at the specified air volume, and the static pressure is monitored to adjust the speed. . Some calculation formulas are designed to logarithmic calculations or high-order polynomials. This requires the microprocessor controller MCU of the motor controller to have a relatively large computational power, which further increases the cost.

发明内容 Summary of the invention

本发明的目的是提供一种电机的恒风量控制方法，该方法效率高、速度快、控制精度高、风量计算数学模型简单便捷，实施成本低，可以自动适应在广泛的静压范围。 The object of the present invention is to provide a constant air volume control method for a motor, which has high efficiency, high speed, high control precision, simple and convenient mathematical model for air volume calculation, low implementation cost, and can be automatically adapted to a wide range of static pressure.

本发明的电机的恒风量控制方法的技术方案如下： The technical solution of the constant air volume control method of the motor of the present invention is as follows:

一种电机的恒风量控制方法，它包括如下步骤过程：步骤 1 )先通过实验，在恒力矩模式下测试某个风机***在多个力矩下，风量与转速的关系，从而建立任意力矩和转速下计算风量的函数关系 Q=F ( T, n, V)，其中 Q是风量， T是力矩，！！是转速， V是调整系数，多个力矩段都有一个对应的调整系数 V, 并输入到电机控制器的微处理器里面； A constant air volume control method for a motor, comprising the following steps: Step 1) Firstly, through experiments, test the relationship between the air volume and the speed of a certain fan system under multiple moments in constant torque mode, so as to establish a function relationship between the calculated wind volume at any torque and speed Q = F ( T, n, V ), where Q is the air volume, T is the torque, ! ! Is the speed, V is the adjustment factor, and multiple torque segments have a corresponding adjustment coefficient V, which is input into the microprocessor of the motor controller;

步骤 2 ) 电机控制器的微处理器接受外部输入的目标风量 Q_ref。 Step 2) The microprocessor of the motor controller accepts the externally input target air volume Q _ref .

步骤 3 )电机控制器控制电机在一定的力矩 T下启动电机，使电机进入稳态； Step 3) The motor controller controls the motor to start the motor under a certain torque T, so that the motor enters a steady state;

步骤 4 ) 记录这时候的稳态转速 n, 并通过查表法获得该力矩 T下的调整系数 V, 然后根据步骤 1里的方程计算出该稳态下的风量 Q。； Step 4) Record the steady-state speed n at this time, and obtain the adjustment coefficient V under the torque T by looking up the table, and then calculate the air volume Q under the steady state according to the equation in step 1. ;

步骤 5 ) 电机控制器的微处理器比较目标风量 Q_ref与计算风量 Q。，若目标风量 Q _f与计算风量 Q。相等或相当，则电机维持当前力矩进入稳态工作并记录该稳态下的转速 n; 若目标风量 Q_ref大于计算风量 Q。，电机控制器提升输出力矩 T, 若目标风量 Q_ref少于计算风量 Q。，电机控制器的微处理器减少输出力矩 T; Step 5) The microprocessor of the motor controller compares the target air volume Q _ref with the calculated air volume Q. , if the target air volume Q _f and the calculated air volume Q. Equal or equivalent, the motor maintains the current torque into steady state operation and records the rotational speed n at the steady state; if the target air volume Q _{ref is} greater than the calculated air volume Q. The motor controller increases the output torque T if the target air volume Q _{ref is} less than the calculated air volume Q. The microprocessor of the motor controller reduces the output torque T;

步骤 6 ) 电机经调整力矩进入稳态后，重新记录提升或者减少力矩下的稳态转速 n, 并再次查表获取新力矩下的 V值，然后重新计算风量 Q。； Step 6) After the motor enters the steady state after adjusting the torque, re-record the steady state speed n under the lifting or reducing torque, and check the table again to obtain the V value under the new torque, and then recalculate the air volume Q. ;

步骤 7)重复步骤 5和步骤 6 , 直到计算风量 Q。与目标风量 Q_ref相等或相当，停止调整力矩，电机进入稳态，同时记录该稳态下的转速 n。 Step 7) Repeat steps 5 and 6 until the air volume Q is calculated. Equal to or equal to the target air volume Q _ref , stop adjusting the torque, the motor enters the steady state, and record the speed n in the steady state.

上述所述的步骤 7)后面还有步骤 8 ), 如果外部***发生改变，导致转速和输出风量变化，这时电机控制器通过比较新的稳态转速和步骤 5 )或步骤 7 ) 里的转速可以知道输出风量已经发生了变化，重复步骤 4、步骤 5、步骤 6和步骤 7。上述所述的风量的计算式 Q=F ( T,

或者釆用 Step 7) described above is followed by step 8). If the external system changes, the speed and output air volume change, and the motor controller compares the new steady-state speed with the speed in step 5) or step 7). It can be known that the output air volume has changed, and repeat steps 4, 5, 6 and 7. The calculation formula of the air volume described above is Q=F (T,

Or use

Q =Q =

系数 c。， c^P c₂通过在基准力矩 T_base, 不同外部静压情况下根据转速和风量参数的原始数据通过曲线拟合的方法来获得。

Coefficient c. , c^P c _{2 is} obtained by curve fitting method according to the raw data of the rotational speed and the air volume parameter under the reference torque T _base and different external static pressure conditions.

上述所述基准力矩 T_base的范围 30%T。至 80%T。， Τ。是电机额定力矩。 The range of the reference torque T _base described above is 30%T. Up to 80% T. , Τ. Is the rated torque of the motor.

上述所述函数关系 Q=F ( Τ, n， V)中调整系数 V值在 0. 1到 2之间变化。上述所述步骤 5和步骤 7)所述的计算风量 Q。与目标风量 Q„_f相等或相当，指计算风量 Qc在目标风量 Q„_f士误差窗口之内，目标风量 Q„_f的误差窗口一般在 1%到 2%范围内。 The value of the adjustment coefficient V in the above-mentioned functional relationship Q=F ( Τ, n, V) varies between 0.1 and 2. Calculate the air volume Q as described in the above steps 5 and 7). It is equal to or equivalent to the target air volume Q„ _f , which means that the calculated air volume Qc is within the target air volume Q„ _f error window, and the error window of the target air volume Q„ _f is generally in the range of 1% to 2%.

上述所述步骤 5)所述的电机控制器提升或减少输出力矩 T, 主要指在步骤 5)所述力矩 T下按每次至少 1%T。的步长顺序提升或减少，或者可以让新力矩 = 当前力矩) (（目标风量 (W当前计算风量 Q_c)²。 The motor controller according to the above step 5) raises or reduces the output torque T, which mainly refers to at least 1% T at each moment T in the step 5). The step size is increased or decreased in sequence, or the new torque = current torque can be made ((target air volume (W current calculated air volume Q _c ) ² .

上述所述的函数关系 Q=F ( Τ, n, V) 是利用基准力矩 T_base和其他力矩下的不同外部静压情况下转速和风量参数的原始数据来获得的，将电机安装在风轮上放在一个空调设备里面，设置好电机在恒力矩工作状态，在不大于额定力矩的范围内，选择包括基准力矩在内的多个力矩的值，使电机在每个力矩工作，并依次改变***的外部静压，来釆集包括转速，风量参数的原始数据。 The above-mentioned functional relationship Q=F ( Τ, n, V) is obtained by using the reference torque T _base and the raw data of the rotational speed and air volume parameters under different external static pressures under other torques, and mounting the motor on the wind wheel. Put it on an air-conditioning device, set the motor to work at constant torque, and within a range not greater than the rated torque, select the value of multiple torques including the reference torque to make the motor work at each torque and change sequentially. The external static pressure of the system is used to collect the raw data including the speed and air volume parameters.

本发明的空调风机***的恒风量控制方法的技术方案如下： The technical solution of the constant air volume control method of the air conditioning fan system of the present invention is as follows:

一种空调风机***的恒风量控制方法，所述的空调风机***包括电机和风轮，所述的电机包括电机控制器、定子组件和转子组件， Constant air volume control method for an air conditioning fan system, the air conditioning fan system including a motor and a wind The motor includes a motor controller, a stator assembly and a rotor assembly,

它包括如下步骤过程 It includes the following steps

步骤 1 )设置好电机在恒力矩工作状态，在不大于额定力矩的范围内，选择包括基准力矩在内的多个力矩的值，使电机在每个力矩工作，并依次改变系统的外部静压，来釆集包括转速，风量参数的原始数据； Step 1) Set the motor to work in constant torque. In the range not greater than the rated torque, select the value of multiple torques including the reference torque, so that the motor works at each torque, and sequentially change the external static pressure of the system. , to collect the raw data including the speed and air volume parameters;

步骤 2 )在电机控制器的微处理器里面建立计算风量的函数关系 Q=F ( T, n, V)，其中 Q是风量， T是力矩，！！是转速， V是调整系数，多个力矩段都有一个对应的调整系数 V, 并输入到电机控制器的微处理器里面； Step 2) Establish a function relationship of the calculated air volume in the microprocessor of the motor controller Q=F (T, n, V), where Q is the air volume and T is the torque, ! ! Is the speed, V is the adjustment factor, and multiple torque segments have a corresponding adjustment coefficient V, which is input into the microprocessor of the motor controller;

步骤 3 ) 电机控制器接受外部输入的目标风量 Q_ref ; Step 3) The motor controller accepts the externally input target air volume Q _ref ;

步骤 4 )在一定的力矩 T下启动电机，使电机进入稳态； Step 4) Start the motor at a certain torque T to make the motor enter the steady state;

步骤 5 )记录这时候的稳态转速 n, 并通过查表法获得该力矩 T下的调整系数 V , 然后根据步骤 1里的方程计算出该稳态下的风量 Q。； Step 5) Record the steady-state speed n at this time, and obtain the adjustment coefficient V under the torque T by looking up the table, and then calculate the air volume Q under the steady state according to the equation in step 1. ;

步骤 6 ) 比较目标风量 Q_{r ef}与计算风量 Q。，若目标风量 Q_ref与计算风量 Qc相等或相当，则电机维持当前力矩进入稳态工作并记录该稳态下的转速 n; 若目标风量 Q_{r ef}大于计算风量 Qc , 电机控制器提升输出力矩 T, 若目标风量 Q_ref少于计算风量 Q。，电机控制器的微处理器减少输出力矩 T; Step 6) Compare the target air volume Q _{r ef} with the calculated air volume Q. If the target air volume Q _ref is equal to or equal to the calculated air volume Qc, the motor maintains the current torque to enter the steady state operation and records the steady state speed n; if the target air volume Q _{r ef is} greater than the calculated air volume Qc, the motor controller increases the output torque T, if the target air volume Q _{ref is} less than the calculated air volume Q. The microprocessor of the motor controller reduces the output torque T;

步骤 7 ) 电机经调整力矩进入稳态后，重新记录提升或者减少力矩下的稳态转速 n, 电机控制器通过查表法重新查找对应的调整系数 V, 重新计算新稳态下的风量 Qc ; Step 7) After the motor enters the steady state after adjusting the torque, re-record the steady-state speed n under the lifting or reducing torque. The motor controller re-finds the corresponding adjustment coefficient V by the look-up table method, and recalculates the air volume Qc under the new steady state;

步骤 8)重复步骤 6和步骤 7 , 直到计算风量 Q。与目标风量 Q_{r ef}相等或相当，停止调整力矩，电机进入稳态，同时记录该稳态下的转速 n。 Step 8) Repeat steps 6 and 7 until the air volume Q is calculated. Equal to or equal to the target air volume Q _{r ef} , stop adjusting the torque, the motor enters the steady state, and record the speed n at the steady state.

上述所述的步骤 8)后面还有步骤 9 ), 如果外部***发生改变，导致转速和输出风量变化，这时电机控制器通过比较新的稳态转速和步骤 6 )或步骤 8 ) 步骤 8。 Step 8) described above is followed by step 9). If the external system changes, causing the speed and output air volume to change, then the motor controller compares the new steady state speed with step 6) or step 8) Step 8.

上述所述的风量的计算式如下:

The calculation formula of the above air volume is as follows:

或者釆用

Or use

系数 c。， c^P c₂是通过在基准力矩 T_base, 不同外部静压情况下根据转速和风量参数的原始数据通过曲线拟合的方法来获得。 Coefficient c. , c^P c ₂ is obtained by curve fitting method according to the raw data of the rotational speed and the air volume parameter under the reference torque T _base and different external static pressure conditions.

上述所述的基准力矩 T_base的范围 30%T。至 80%T。， Τ。是电机额定力矩。 The range of the reference torque T _base described above is 30%T. Up to 80% T. , Τ. Is the rated torque of the motor.

上述所述的函数关系 Q=F ( T, n， V)中调整系数 V值在 0. 1到 2之间变化。上述所述的步骤 6和步骤 8)所述的计算风量 Q。与目标风量 Q„_f相等或相当，指计算风量 Q。在目标风量 Q_ref ±误差窗口之内，目标风量 Q_ref的误差窗口一般在 1%到 2%范围内。 The value of the adjustment coefficient V in the above-mentioned functional relationship Q=F (T, n, V) varies between 0.1 and 2. The air volume Q is calculated as described in the above-mentioned step 6 and step 8). It is equal or equivalent to the target air volume Q„ _f , which refers to the calculation of the air volume Q. Within the target air volume Q _ref ± error window, the error window of the target air volume Q _ref is generally in the range of 1% to 2%.

上述所述的步骤 6)所述的电机控制器提升或减少输出力矩 T, 主要指在步骤 6)所述力矩 T下按每次至少 1%T。的步长顺序提升或减少，或者可以让新力矩=当前力矩) (（目标风量 Q_ref/当前计算风量 Q。)²。 The motor controller of step 6) described above raises or reduces the output torque T, mainly referring to at least 1% T at each moment T in the step 6). The step size is increased or decreased in sequence, or the new torque = current torque can be made ((target air volume Q _ref / current calculated air volume Q.) ² .

本发明与现有技术相比具有如下优点： 1 )通过设置好电机在恒力矩工作状态，在不大于额定力矩的范围内，选择包括基准力矩在内的多个力矩的值，使电机在每个力矩工作，并依次改变***的外部静压，来釆集包括转速，风量参数的原始数据，利用在不同力矩在不同外部静压情况下转速和风量参数的原始数据，得到计算风量的函数关系 Q=F ( T, n, V)，计算风量的数学模型只有一阶或二阶的函数，非常简单，简化计算，效率高、响应速度快、控制精度高、实施成本低；经过大量试验测试，风量控制误差在 0. 5%-5%的范围，具有良好应用前景； 2)本发明方法可以适应在广泛的静压范围，风量计算与***外部静压，从而简化产品结构，降低成本。 Compared with the prior art, the invention has the following advantages: 1) by setting the motor in a constant torque working state, in a range not exceeding the rated torque, selecting a plurality of torque values including the reference torque, so that the motor is in each The torque works, and sequentially changes the external static pressure of the system, to collect the original data including the rotational speed and air volume parameters, and use the raw data of the rotational speed and the air volume parameters under different external static pressure conditions to obtain the function of the calculated air volume. Q=F ( T, n, V), the mathematical model for calculating the air volume is only one The function of the order or the second order is very simple, the calculation is simplified, the efficiency is high, the response speed is fast, the control precision is high, and the implementation cost is low. After a large number of test tests, the air volume control error is in the range of 0.5%-5%, which has good application. Prospect; 2) The method of the invention can be adapted to a wide range of static pressure, air volume calculation and external static pressure of the system, thereby simplifying product structure and reducing cost.

附图说明： BRIEF DESCRIPTION OF THE DRAWINGS:

图 1是传统的空调风机***的结构示意图； 1 is a schematic structural view of a conventional air conditioning fan system;

图 2是本发明的空调***的控制流程图； Figure 2 is a control flow chart of the air conditioning system of the present invention;

图 3是本发明的原理框图； Figure 3 is a schematic block diagram of the present invention;

图 4是本发明在某台负载上的测量数据的拟合直线图； Figure 4 is a straight line drawing of the measurement data of the present invention on a load;

图 5是本发明的部分的流程图。 Figure 5 is a flow chart of a portion of the invention.

具体实施方式： detailed description:

如图 1所示，在一个典型的空调通风管道里，安装了一个鼓风***（如燃气炉或空气处理机），图中以 "电机 +风轮" 代替，管道里还有空气过滤器，电机启动时开始鼓风，由于出风口和入风口的数量与房间数有关，管道的设计也没有统一的标准，同时过滤器也可能有不同的压降，导致搭载传统的单相交流电机一-PSC电机的鼓风***在不同的管道里，实际的风量会不同。 As shown in Figure 1, in a typical air conditioning ventilation duct, an air blowing system (such as a gas stove or an air handler) is installed. The figure is replaced by "motor + wind wheel", and there is an air filter in the pipe. When the motor starts, the air blows. Since the number of air outlets and air inlets is related to the number of rooms, there is no uniform standard for the design of the pipeline. At the same time, the filter may have different pressure drops, resulting in a conventional single-phase AC motor. The blast system of the PSC motor is in different pipes, and the actual air volume will be different.

如图 2所示，本发明釆用一台 ECM电机（电子换向电机）来带动风轮转动， ECM电机含有电机控制器，该电机控制器与空调***控制器进行连接通信，例如空调***控制器将目标风量发送到电机控制器，电机控制器控制电机带动风轮运转，输出目标风量，相当于恒风量控制。 As shown in FIG. 2, the present invention uses an ECM motor (electronic commutating motor) to drive the wind wheel to rotate. The ECM motor includes a motor controller that communicates with the air conditioning system controller, such as an air conditioning system control. The device sends the target air volume to the motor controller, and the motor controller controls the motor to drive the wind wheel to operate, and outputs the target air volume, which is equivalent to the constant air volume control.

如图 3所示，空调***控制器向电机控制器的微处理器输入目标风量 Q_ref，电机控制器包括传感器、微处理器和功率逆变模块，传感器将电机的转速信号 RPM、电流信号 I_d。输入到微处理器，功率逆变模块输出的 P醫信号也送到微处理器处理，函数关系 Q=F ( T, n, V)涉及到的各系数，包括不同工作力矩下对应的调整系数 V的对照表，预先输入到电机控制器的微处理器里面，微处理器比较目标风量 Q_ief与计算风量 Q。，调整输出信号，以力矩为受控量来间接的控制风量。若目标风量 Q _f大于计算风量 Qc , 电机控制器提升输出力矩 T, 若目标风量 Q _f少于计算风量 Qc , 电机控制器的微处理器减少输出力矩 T, 电机进入稳态后，重新记录提升或者减少力矩下的稳态转速 n, 电机控制器通过查表法重新查找对应的调整系数 V, 重新计算计算风量 Q。，直到计算风量 Qc与目标风量 Q _f相等或相当，停止调整力矩电机进入稳态，即恒风量状态。目标风量 Q _f是一个固定值，只不过微处理器里面，当程序调节 Qc到目标风量士误差窗口之内，即认定达到要求而停止调节，这样做的好处是防止因为微小扰动带来的反复调节而无法达到稳定的风量。目标风量 Q _f 的误差窗口一般在 1%到 2%范围内。 As shown in FIG. 3, the air conditioning system controller inputs a target air volume Q _{ref to the} microprocessor of the motor controller. The motor controller includes a sensor, a microprocessor and a power inverter module, and the sensor rotates the motor speed signal RPM and the current signal I. _d . Input to the microprocessor, the P medical signal output from the power inverter module is also sent to the micro Processor processing, the function relationship Q = F (T, n, V) involved in the various coefficients, including the corresponding adjustment coefficient V under different working torques, a pre-input into the microprocessor of the motor controller, micro-processing The device compares the target air volume Q _ief with the calculated air volume Q. , adjust the output signal, indirectly control the air volume with the torque as the controlled amount. If the target air volume Q _{f is} greater than the calculated air volume Qc, the motor controller increases the output torque T. If the target air volume Q _{f is} less than the calculated air volume Qc , the microprocessor of the motor controller reduces the output torque T, and after the motor enters the steady state, the recording is resumed. Or reduce the steady-state speed n under the torque, the motor controller re-find the corresponding adjustment coefficient V by looking up the table, and recalculate the calculated air volume Q. Until the calculated air volume Qc is equal to or equal to the target air volume Q _f , stop adjusting the torque motor to enter the steady state, that is, the constant air volume state. The target air volume Q _f is a fixed value, but in the microprocessor, when the program adjusts Qc to the target wind volume error window, it is determined that the requirement is met and the adjustment is stopped. The advantage of this is to prevent the repetition caused by the small disturbance. Adjusted to achieve a stable air volume. The error window of the target air volume Q _f is generally in the range of 1% to 2%.

一种空调风机***的恒风量控制方法，所述的空调风机***包括电机和风轮，所述的电机包括电机控制器、定子组件和转子组件，它包括如下步骤过程：步骤 1 )设置好电机在恒力矩工作状态，在不大于额定力矩的范围内，选择包括基准力矩在内的多个力矩的值，使电机在每个力矩工作，并依次改变系统的外部静压，来釆集包括转速，风量参数的原始数据； A constant air volume control method for an air conditioning fan system, the air conditioning fan system comprising a motor and a wind wheel, the motor comprising a motor controller, a stator assembly and a rotor assembly, comprising the following steps: Step 1) setting the motor in Constant torque working state, within the range of not more than the rated torque, select the value of multiple torques including the reference torque, so that the motor works at each torque, and sequentially change the external static pressure of the system to collect the speed, Raw data of the air volume parameter;

步骤 4 )在一定的力矩 T下启动电机，使电机进入稳态；步骤 5 )记录这时候的稳态转速 n, 并通过查表法获得该力矩 T下的调整系数 V, 然后根据步骤 1里的方程计算出该稳态下的风量 Q。； Step 4) Start the motor at a certain torque T to make the motor enter the steady state; Step 5) Record the steady-state rotational speed n at this time, and obtain the adjustment coefficient V under the torque T by the look-up table method, and then calculate the air volume Q under the steady state according to the equation in the step 1. ;

步骤 6 ) 比较目标风量 Q_ref与计算风量 Q。，若目标风量 Q_ref与计算风量 Qc相等或相当，则电机维持当前力矩进入稳态工作并记录该稳态下的转速 n; 若目标风量 Q_ref大于计算风量 Qc, 电机控制器提升输出力矩 T, 若目标风量 Q_ref少于计算风量 Q。，电机控制器的微处理器减少输出力矩 T; Step 6) Compare the target air volume Q _ref with the calculated air volume Q. If the target air volume Q _ref is equal to or equal to the calculated air volume Qc, the motor maintains the current torque to enter the steady state operation and records the steady state speed n; if the target air volume Q _{ref is} greater than the calculated air volume Qc, the motor controller increases the output torque T If the target air volume Q _{ref is} less than the calculated air volume Q. The microprocessor of the motor controller reduces the output torque T;

步骤 7 ) 电机经调整力矩进入稳态后，重新记录提升或者减少力矩下的稳态转速 n, 电机控制器通过查表法重新查找对应的调整系数 V, 重新计算新稳态下的风量 Qc; Step 7) After the motor enters the steady state after adjusting the torque, re-record the steady-state speed n under the lifting or reducing torque, the motor controller re-find the corresponding adjustment coefficient V by the look-up table method, and recalculate the air volume Qc under the new steady state;

步骤 8)重复步骤 6和步骤 7, 直到计算风量 Q。与目标风量 Q_ref相等或相当，停止调整力矩，电机进入稳态，同时记录该稳态下的转速 n。 Step 8) Repeat steps 6 and 7 until the air volume Q is calculated. Equal to or equal to the target air volume Q _ref , stop adjusting the torque, the motor enters the steady state, and record the speed n at the steady state.

上述所述的步骤 8)后面还有步骤 9 ), 如果外部***发生改变，比如通风管道积灰或部分堵塞，导致转速和输出风量变化，这时电机控制器通过比较新的稳态转速和步骤 6 )或步骤 8 )里的转速可以知道输出风量已经发生了变化。重复步骤 5、步骤 6、步骤 7和步骤 8。 Step 8) described above is followed by step 9). If the external system changes, such as ash or partial blockage of the ventilation duct, causing the speed and output air volume to change, the motor controller passes the new steady state speed and steps. 6) or the speed in step 8) can know that the output air volume has changed. Repeat steps 5, 6, 6, and 8.

上述所述的风量的计算式如下：

The calculation formula of the above air volume is as follows:

或者釆用

Or use

系数 c。， c^P c₂是通过在基准力矩 T_base, 不同外部静压情况下根据转速和风量参数的原始数据通过曲线拟合的方法来获得。上述所述的基准力矩 T_base的范围 30%T。至 80%T。， Τ。是电机额定力矩。上述所述的函数关系 Q=F ( Τ , n， V)中调整系数 V值在 0. 1到 2之间变化。上述所述的步骤 5和步骤 7)所述的计算风量 Q。与目标风量 Q_ref相等或相当，指计算风量 Qc在目标风量 Q_ref士误差窗口之内，目标风量 Q _f的误差窗口一般在 1 %到 2%范围内。上述所述的步骤 6)所述的电机控制器提升或减少输出力矩 T , 主要指在步骤 6)所述力矩 T下按每次至少 1%T。的步长顺序提升或减少，或者可以让新力矩=当前力矩) (（目标风量 Q_ref/当前计算风量 Q。)²。下面是函数关系 Q=F ( T , n, V)的推导过程，风扇定律指出，在一定条件下， Coefficient c. , c^P c ₂ is obtained by curve fitting method according to the raw data of the rotational speed and the air volume parameter under the reference torque T _base and different external static pressure conditions. The range of the reference torque T _base described above is 30%T. Up to 80% T. , Τ. Is the rated torque of the motor. The value of the adjustment coefficient V in the function relationship Q=F ( Τ , n, V) described above varies between 0.1 and 2. Calculate the air volume Q as described in step 5 and step 7) above. Equal to or equal to the target air volume Q _ref , the calculated air volume Qc is within the target air volume Q _ref error window, and the error window of the target air volume Q _f is generally in the range of 1% to 2%. The motor controller of step 6) described above raises or reduces the output torque T, mainly referring to at least 1% T at each moment T in the step 6). The step size is increased or decreased, or the new torque = current torque can be given ((target air volume Q _ref / current calculated air volume Q.) ² . The following is the derivation process of the function relationship Q = F ( T , n, V), The fan law states that under certain conditions,

• 风量与转速成正比； • The air volume is proportional to the speed;

• 风扇外部气压与转速平方成正比； • The external air pressure of the fan is proportional to the square of the speed;

• 电机输出力矩（即风扇输入力矩）与转速平方成正比；

• The motor output torque (ie the fan input torque) is proportional to the square of the speed;

2 2

n₂

n ₂

T₂ n₂ Q₂ T ₂ n ₂ Q ₂

其中： n是电机转速， Q是风量， P是风扇的外部气压升， T是电机的输出力矩 _: 也就是风扇的输入力矩。为了推导方便，把基准力矩下的风量 -转速关系式记为： Where: n is the motor speed, Q is the air volume, P is the external air pressure rise of the fan, and T is the output torque of the motor _: that is, the input torque of the fan. For the convenience of derivation, the relationship between the air volume and the speed under the reference torque is recorded as:

0 ^equi .v = c0 + cl x 7i equiv 或者（如果用二次多项式的话） 0 ^equi .v = c0 + cl x 7i equiv Or (if using a quadratic polynomial)

Q . Q .

^equiv =c0 + clx7i equi -v +c2x7i equiv ^equiv =c0 + clx7i equi -v +c2x7i equiv

从上面的公式，结合风扇定律，我们可以进一步推导出在任意力矩下，转速和风量的关系。为了做到这一点，我们需要推导出在 Τ = Τ 时的等效风量 From the above formula, combined with the fan law, we can further derive the relationship between the speed and the air volume at any torque. In order to do this, we need to derive the equivalent air volume at Τ = Τ

Q_equiv和等效转速是如何根据风扇定律折算到新的力矩下的： How Q _equiv and the equivalent speed are converted to the new torque according to the fan law:

如果用线性关 ,

If you use linear off,

Q(T,n) = Q_eqmv + clxnQ(T,n) = Q _eqmv + clxn

如果用二次多项式: If using a quadratic polynomial:

从实验结果来看，测试风量的设备始终动态调节背压来控制外部静压，这导致风扇定理在整个风量范围内并非成立，需要在上述公式中增加一个调整系数 L 调整后的公式如下：

From the experimental results, the equipment that tests the air volume always adjusts the back pressure dynamically to control the external static pressure. This causes the fan theorem to be not true within the entire air volume range. It is necessary to add an adjustment factor L to the above formula. The adjusted formula is as follows:

如果用线性关系式，

如果用二次多项式 base If you use a linear relationship,

If using a quadratic polynomial base

+ clxn + c2xn x + clxn + c2xn x

base TxV Base TxV

这个调整系数 V值在 0.1到 2之间变化，选取的原则是让从上式计算出来的风量值与实际测试值相等或相近，如表 1是某负载的 V值表，表 1中基准力矩 T_base设为 50% T。，其它力矩为测试方便选为： 10%Τ。、 20%Τ。、 30%Τ。、 40%Τ。、 60%Τ。、 70%Τ。、 80%Τ。、 90%Τ。、 100%Τ。, 对应的调整系数 V值也记录在表 1中, 其中 Τ。为电机额定力矩，在其他未测量的力矩工况下， V值可由邻近的两个 Τ 所属的 V值来线性插值计算获得。

The adjustment coefficient V value varies between 0.1 and 2. The principle of selection is to make the air volume value calculated from the above formula equal or close to the actual test value, as shown in Table 1 is the V value table of a load, and the reference torque in Table 1. T _{base is} set to 50% T. Other torques are easily selected for testing: 10% Τ. 20%. 30%Τ. 40%Τ. 60%Τ. 70%Τ. 80%Τ. 90%Τ. , 100% Τ. The corresponding adjustment factor V value is also recorded in Table 1, where Τ. For the rated torque of the motor, under other unmeasured torque conditions, the V value can be calculated by linear interpolation of the V values of the two adjacent Τ.

表 1某负载的 V值表 Table 1 V value table of a load

上述的计算式是以选定一个基准力矩为前提，从而推导出一个该力矩下的风量与转速的函数关系式。从保证计算精度，并简化计算量的角度来看，这个函数既可以是线性的， The above calculation formula is based on the selection of a reference torque, and derives a relationship between the air volume and the rotational speed under this torque. From the perspective of guaranteeing calculation accuracy and simplifying the calculation, this function can be linear.

0 ^equi .v =cO + clx7i equiv 0 ^equi .v =cO + clx7i equiv

也可以是二次多项式 ft -equiv = cO + clx7i equi .v +c2x7i e²qui .v It can also be a quadratic polynomial ft -equiv = cO + clx7i equi .v +c2x7i e ² qui .v

实验数据表明，如果用更高阶的函数来描述风量与转速的关系会产生 "过度曲线拟合" 的问题，即计算量远远增大而拟合精度并未提高的现象。有了这个函数，可以进一步推导在其他任意力矩和转速下，风量的计算函数 Q=F (T, n, V)。在不同的力矩下，调整系数 V值也不同。因此，需要设置好电机在恒力矩工作状态，在不大于额定力矩的范围内，选择包括基准力矩在内的多个力矩 τ的值，使电机在每个力矩 τ下工作，并依次改变***的外部静压，来釆集包括转速，风量参数的原始数据测量。某负载的部分原始数据的测试结果如下表 2所示，通过原始数据得到表 1所示的不同力矩下对应的调整系数 V，其选取的原则是让从上式计算出来的风量值与实际测试值相等或相近。 The experimental data shows that if a higher-order function is used to describe the relationship between the air volume and the rotational speed, the problem of "excessive curve fitting" will occur, that is, the calculation amount is far increased and the fitting accuracy is not improved. With this function, the calculation function of the air volume Q=F (T, n, V) can be further derived under any other torque and speed. The adjustment factor V is also different under different torques. Therefore, it is necessary to set the motor to work in a constant torque state, and select a plurality of forces including the reference torque within a range not greater than the rated torque. The value of the moment τ causes the motor to operate at each torque τ, and sequentially changes the external static pressure of the system to collect the raw data measurement including the rotational speed and air volume parameters. The test results of some raw data of a load are shown in Table 2 below. The corresponding adjustment coefficient V under different torques shown in Table 1 is obtained from the original data. The principle of selection is to let the air volume value calculated from the above formula and the actual test. The values are equal or similar.

实测转速 Measured speed

力矩 τ 静压（Pa) 实测风量 Q (CFM) Torque τ Static Pressure (Pa) Measured Air Volume Q (CFM)

( RPM ) ( RPM )

TO* 100% 25 1476.5 314 TO* 100% 25 1476.5 314

TO* 100% 50 1441.1 935 TO* 100% 50 1441.1 935

TO* 100% 75 1407.7 968 TO* 100% 75 1407.7 968

实测转速 Measured speed

( RPM ) ( RPM )

Τ0*50% 25 1072.3 713 Τ0*50% 25 1072.3 713

Τ0*50% 50 1035.8 750 Τ0*50% 50 1035.8 750

Τ0*50% 75 785 实测转速 Τ0*50% 75 785 measured speed

( RPM ) ( RPM )

TO* 10% 25 573.0 472 TO* 10% 25 573.0 472

TO* 10% 37.5 503.8 501 TO* 10% 50 486.6 545 TO* 10% 37.5 503.8 501 TO* 10% 50 486.6 545

表 2 某负载的部分原始数据 Table 2 Part of the raw data of a load

下面举例说明恒风量的控制过程： The following example illustrates the control process of constant air volume:

步骤 1 )获取以上表为例的原始数据后，选定基准力矩 T = 50%To, 利用转速 η和实测风量 Q的数据进行绘图拟合成直线，建立计算风量在基准力矩下的的函数关系 Q_base=F (n) , 这里以基准力矩下的线性关系式为例： Step 1) After obtaining the raw data of the above table as an example, the reference torque T = 50%To is selected, and the data of the rotational speed η and the measured air volume Q are used to map and fit into a straight line, and the function relationship of the calculated air volume under the reference moment is established. Q _base =F (n) , here is the linear relationship under the reference moment:

0 ^equi .v =c0 + clx7i equiv 绘制成图像如图 4所示。于是可以按照曲线拟合的方法获得两个风量系数 c。， _Cl。然后在原始数据的基础上，按照 "选择 V值使计算风量的结果与实测风量的结果相等或相近" 为原则确定所有力矩下的 V值，如表 1所示。这时，任意转速与力矩下的风量函数关系式 Q=F (Τ, n， V)可以确定如下： 0 ^equi .v =c0 + clx7i equiv is drawn as an image as shown in Figure 4. Thus, two air volume coefficients c can be obtained in accordance with the curve fitting method. , _Cl . Then, based on the original data, the V value under all the moments is determined according to the principle of "selecting the V value so that the calculated air volume result is equal or close to the measured air volume result", as shown in Table 1. At this time, the relationship between the air volume function at any speed and torque Q = F (Τ, n, V) can be determined as follows:

TxV TxV

Q = cO + clxn Q = cO + clxn

base 其中 Q是风量 (CFM), T是力矩（_0Z-ft), n是转速 (RPM), V是调整系数如表 1 所示，并预先输入到电机控制器的微处理器里面； Base where Q is the air volume (CFM), T is the torque ( _{0Z -} ft), n is the speed (RPM), V is the adjustment factor as shown in Table 1, and is pre-inputted into the microprocessor of the motor controller;

步骤 2 ) 空调***控制器向电机控制器的微处理器输入目标风量 Q„_f; Step 2) The air conditioning system controller inputs the target air volume Q„ _{f to} the microprocessor of the motor controller;

步骤 3至步骤 8的见图 5所示， Step 3 to Step 8 are shown in Figure 5,

步骤 3)在一定的力矩 T下启动电机，使电机进入稳态； Step 3) Start the motor at a certain torque T to make the motor enter the steady state;

步骤 4 )记录这时候的稳态转速 n, 电机控制器通过查表法查找对应的调整系数 V, 并计算出计算风量 (k 步骤 5 ) 比较目标风量 Q„_f与计算风量 Q。，若目标风量 Q„_f与计算风量 Q。相等或相当，则电机维持当前力矩进入稳态工作并记录该稳态下的转速 n; 若目标风量 Q_ref大于计算风量 Qc, 电机控制器提升输出力矩 T, 若目标风量 Q_ref少于计算风量 Q。，电机控制器的微处理器减少输出力矩 T; Step 4) Record the steady-state speed n at this time, the motor controller finds the corresponding adjustment coefficient V by looking up the table, and calculates the calculated air volume (k step 5). Compare the target air volume Q„ _f with the calculated air volume Q. If the target The air volume Q„ _f and the calculated air volume Q. Equal or equivalent, the motor maintains the current torque into steady state operation and records the speed n in the steady state; if the target air volume Q _{ref is} greater than the calculated air volume Qc, the motor controller increases the output torque T, if the target air volume Q _{ref is} less than Calculate the air volume Q. The microprocessor of the motor controller reduces the output torque T;

步骤 6 ) 电机经调整力矩进入稳态后，重新记录提升或者减少力矩下的稳态转速 η, 电机控制器通过查表法重新查找对应的调整系数 V, 重新计算新稳态下的风量 Qc; Step 6) After the motor enters the steady state after adjusting the torque, re-record the steady-state speed η under the lifting or reducing torque, the motor controller re-find the corresponding adjustment coefficient V by looking up the table, and recalculate the air volume Qc under the new steady state;

步骤 7)重复步骤 5和步骤 6 , 直到计算风量 Q。与目标风量 Q_ref相等或相当，停止调整力矩电机进入稳态，同时记录该稳态下的转速 n。 Step 7) Repeat steps 5 and 6 until the air volume Q is calculated. Equal to or equal to the target air volume Q _ref , stop adjusting the torque motor to enter the steady state, and record the rotational speed n at the steady state.

上述所述的步骤 7)后面还有步骤 8 ), 如果外部***发生改变（比如通风管道积灰或部分堵塞），导致转速和输出风量变化，这时电机控制器通过比较新的稳态转速和步骤 5 )或步骤 7 ) 里的转速可以知道输出风量已经发生了变化。重复步骤 4、步骤 5、步骤 6和步骤 7。 Step 7) described above is followed by step 8). If the external system changes (such as ash or partial blockage of the ventilation duct), the speed and output air volume change, and the motor controller compares the new steady-state speed and The speed in step 5) or step 7) can be known that the output air volume has changed. Repeat steps 4, 5, 6 and 7.

Claims

权利要求 Rights request

1、一种电机的恒风量控制方法，其特征在于，它包括如下步骤过程： A method for controlling a constant air volume of a motor, characterized in that it comprises the following steps:

步骤 1 )先通过实验，在恒力矩模式下测试某个风机***在多个力矩下，风量与转速的关系，从而建立任意力矩和转速下计算风量的函数关系 Q=F ( T, n, V)，其中 Q是风量， T是力矩，！！是转速， V是调整系数，多个力矩段都有一个对应的调整系数 V, 并输入到电机控制器的微处理器里面； Step 1) Firstly, through experiments, test the relationship between the air volume and the speed of a certain fan system under multiple moments in constant torque mode, so as to establish a function relationship between the calculated wind volume at any torque and speed Q = F ( T, n, V ), where Q is the air volume, T is the torque, ! ! Is the speed, V is the adjustment factor, and multiple torque segments have a corresponding adjustment coefficient V, which is input into the microprocessor of the motor controller;

2、根据权利要求 1所述的一种电机的恒风量控制方法，其特征在于：步骤 7)后面还有步骤 8 ), 如果外部***发生改变，导致转速和输出风量变化，这时电机控制器通过比较新的稳态转速和步骤 5 )或步骤 7 ) 里的转速可以知道输出风量已经发生了变化，重复步骤 4、步骤 5、步骤 6和步骤 7。 2. The constant air volume control method for a motor according to claim 1, wherein step 7) is followed by step 8), if the external system changes, causing the speed and the output air volume to change, then the motor controller By comparing the new steady-state speed with the speed in step 5) or step 7) The output air volume has changed, repeat steps 4, 5, 6, and 7.

3、根据权利要求 1 所述的一种电机的恒风量控制方法，其特征在于

3. A constant air volume control method for a motor according to claim 1, wherein

或者釆用

Or use

4、根据权利要求 3所述的一种电机的恒风量控制方法，其特征在于：基准力矩 T_base的范围为 30%T。至讀。, Τ。是电机额定力矩。 4. The constant air volume control method for a motor according to claim 3, wherein the reference torque _Tbase ranges from 30%T. To read. , Τ. Is the rated torque of the motor.

5、根据权利要求 1、 2或 3所述的一种电机的恒风量控制方法，其特征在于：函数关系 Q=F ( T, n， V)中调整系数 V值在 0. 1到 2之间变化。 The second embodiment of the present invention, wherein the value of the adjustment coefficient V is 0.1 to 2 in the function relationship Q=F (T, n, V) Change between.

6、根据权利要求 1、 2或 3所述的一种电机的恒风量控制方法，其特征在于：步骤 5和步骤 7)所述的计算风量 Q。与目标风量 Q„_f相等或相当，指计算风量 Qc在目标风量 Q_ref ±误差窗口之内，目标风量 Q„_f的误差窗口一般在 1%到 2% 范围内。 6. A constant air volume control method for a motor according to claim 1, 2 or 3, characterized in that: the air volume Q is calculated in steps 5 and 7). It is equal to or equivalent to the target air volume Q„ _f , which means that the calculated air volume Qc is within the target air volume Q _ref ± error window, and the error window of the target air volume Q„ _f is generally in the range of 1% to 2%.

7、根据权利要求 1、 2或 3所述的一种电机的恒风量控制方法，其特征在于：步骤 5)所述的电机控制器提升或减少输出力矩 T, 主要指在步骤 5)所述力矩 T下按每次至少 1%T。的步长顺序提升或减少，或者可以让新力矩 =当前力矩) (（目标风量 Q„_f/当前计算风量 Q_c)²。 The constant air volume control method for a motor according to claim 1, 2 or 3, wherein: the motor controller of step 5) increases or decreases the output torque T, which is mainly referred to in step 5). Press at least 1% T at a time under torque T. The step size is increased or decreased in sequence, or the new torque = current torque can be made ((target air volume Q„ _f / current calculated air volume Q _c ) ² .

8、根据权利要求 1、 2或 3所述的一种电机的恒风量控制方法，其特征在于：函数关系 Q=F ( T , n, V)是利用基准力矩和其他力矩下的不同外部静压情况下转速和风量参数的原始数据来获得的，将电机安装在风轮上放在一个空调设备里面，设置好电机在恒力矩工作状态，在不大于额定力矩的范围内，选择包括基准力矩在内的多个力矩的值，使电机在每个力矩下工作，并依次改变系统的外部静压，来釆集包括转速，风量参数的原始数据。 8. A constant air volume control method for a motor according to claim 1, 2 or 3, wherein: the functional relationship Q = F (T, n, V) is a different external static using the reference torque and other moments. Feeling In the case of the original data of the speed and air volume parameters, the motor is mounted on the wind wheel and placed in an air conditioning device. The motor is set to work in a constant torque state. In the range not exceeding the rated torque, the selection includes the reference torque. The value of multiple moments within the motor causes the motor to operate at each torque and sequentially changes the external static pressure of the system to collect the raw data including the speed and air volume parameters.

9、一种空调风机***的恒风量控制方法，所述的空调风机***包括电机和风轮，所述的电机包括电机控制器、定子组件和转子组件，其特征在于：它包括如下步骤过程： 9. A constant air volume control method for an air conditioning fan system, the air conditioning fan system comprising a motor and a wind wheel, the motor comprising a motor controller, a stator assembly and a rotor assembly, wherein: the method comprises the following steps:

步骤 7 ) 电机经调整力矩进入稳态后，重新记录提升或者减少力矩下的稳态转速 n, 电机控制器通过查表法重新查找对应的调整系数 V, 重新计算新稳态下的风量 Qc ; Step 7) After the motor enters the steady state after adjusting the torque, re-record the steady-state speed n under the lifting or reducing torque. The motor controller re-discovers the corresponding adjustment coefficient V by looking up the table to recalculate the new stability. Air volume Qc;

10、根据权利要求 9所述的一种空调风机***的恒风量控制方法，其特征在于：步骤 8)后面还有步骤 9 ), 如果外部***发生改变，导致转速和输出风量变化，这时电机控制器通过比较新的稳态转速和步骤 6 )或步骤 8 ) 里的转速可以知道输出风量已经发生了变化。重复步骤 5、步骤 6、步骤 7和步骤 8。 10. The constant air volume control method of an air conditioning fan system according to claim 9, wherein: step 8) is followed by step 9), if the external system changes, causing the speed and the output air volume to change, then the motor The controller knows that the output air volume has changed by comparing the new steady-state speed with the speed in step 6) or step 8). Repeat steps 5, 6, 6, and 8.

11、根据权利要求 9所述的一种空调风机***的恒风量控制方法，其特征在于：

11. The constant air volume control method for an air conditioning fan system according to claim 9, wherein:

或者釆用

Or use

12、根据权利要求 11所述的一种空调风机***的恒风量控制方法，其特征在于：基准力矩 T_base的范围为 30%T。至 ⁸0%T。， Τ。是电机额定力矩。 12. The constant air volume control method of an air conditioning fan system according to claim 11, wherein the reference torque _Tbase ranges from 30%T. Up to ⁸⁰ %T. , Τ. Is the rated torque of the motor.

1 3、根据权利要求 9、 10或 11所述的一种电机的恒风量控制方法，其特征在于：函数关系 Q=F ( T, n， V)中调整系数 V值在 0. 1到 2之间变化。 1至2。 The value of the adjustment coefficient V is 0. 1 to 2, the value of the adjustment coefficient V in the function relationship Q = F (T, n, V) Change between.

14、根据权利要求 9、 10或 11所述的一种电机的恒风量控制方法，其特征在于：步骤 6和步骤 8)所述的计算风量 Q。与目标风量 Q_ref相等或相当，指计算风量 Qc在目标风量 Q_ref士误差窗口之内，目标风量 Q_{r ef}的误差窗口一般在 1% 到 2%范围内。 14. A constant air volume control method for a motor according to claim 9, 10 or 11, wherein: calculating the air volume Q as described in step 6 and step 8). Equal to or equal to the target air volume Q _ref , the calculated air volume Qc is within the target air volume Q _ref error window, and the error window of the target air volume Q _{r ef} is generally 1%. Up to 2%.

15、根据权利要求 9、 10或 11所述的一种电机的恒风量控制方法，其特征在于：步骤 6)所述的电机控制器提升或减少输出力矩 T, 主要指在步骤 6) 所述力矩 T下按每次至少 1%T。的步长顺序提升或减少，或者可以让新力矩 =当前力矩 X (目标风量 Q_ref/当前计算风量 Q。)²。 The constant air volume control method for a motor according to claim 9, 10 or 11, wherein: the motor controller of step 6) increases or decreases the output torque T, which is mainly referred to in step 6). Press at least 1% T at a time under torque T. The sequence of steps to enhance or reduce, or may make this new torque = torque X (target air volume Q _ref / current calculated air volume Q.) ^2.