A novel method of rotor position detect for sensorless brushless dc motor was introduced , that was the method of speed - independent position function 摘要介绍了一种新的无位置传感器无刷直流电动机的转子位置检测方法速度无关位置函数法。
The speed - independent position function of the rotor was given by analyzing the phase current and phase voltage of the permenent magnet brushless dc motor , using the powerful operation function of dsp 利用dsp的强大运算功能,通过分析永磁无刷直流电动机的相电压与相电流给出转子速度无关位置函数。
At last , it deduced a new improvement method from the theories , and make use of a new physical concept ? the independent of speed function for accuracy checking up the turns sub - position and the communication point so as to control sensorless brushless dc motor with the breadth regulating - speed scope from zero to high speed . based on the function , it will research the new control method 最后,从理论上推导了新的改进方法,并利用一个新的物理概念? ?与速度无关的位置函数g ( ) ,其能高精度检测出转子位置和换相点,以此来控制无刷直流电机,实现电机从零转速到高转速的宽速度范围调节,在此基础上研究了应用这种新的位置函数的控制策略。
With the distributions of bond stress and local slip , all specimens " bond - slip curves were simulated . and the calculating formula of characteristic slip and bond strength was conducted by mathematically disposal and statistically regression of bond - slip curves ; by revising the shape of bond - slip curves through " merge to one " , the model of bond - slip relation was confirmed and then a detailed definition on the model was conducted using position functions 结合粘结应力和局部滑移的分布规律,拟合出了各试件的粘结滑移曲线,然后对曲线进行一定的数学处理,经过统计回归后得到了特征滑移值和特征粘结强度的计算公式;对粘结滑移曲线形状经过“归一化”的数学处理进行修正,确定了基本的粘结滑移的本构关系式,并引入了一个位置函数对粘结滑移的本构关系进行了更为细致的描述。
位置: seat; place; location; site函数: function纯位置函数: pure position function线位置函数: pure position function位置函数, 点函数: function of position位置函数控制器: position expression内置函数: built-in function; built-infunctions使某物的形状作为位置函数变化: enable st shape to vary as a function of position一个不可针对参数求值的内置函数: special一个可针对参数求值的内置函数: builtin函数定义位置错误: fuction definition out of place; function definition out ofplace内置函式: intrinsic function位置: 1.(所在或占的地方) seat; place; location; site 大家都按指定的位置坐了下来。 everybody took their places.2.(地位) place; position 她曾是个在政府中占有重要位置的女人。 she was a woman of high position in the government.3.[航] position函数: [数学] function◇函数计算机 function computer; 函数计算器 function calculator; 函数运算 functional operation安放, 定位置, 位置: emplacement基函数, 原函数: primary functiontcb位置: tcb positionxyz位置: xyz positionyy位置: y position按位置: by location; opsition dependent保位置: protected position; protective location部位,位置: location; position(pos)初调(位置): initial setting错位置: wrong placement; wrong position档位置: p* *park* position