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  1. E

    Peak Power and Nominal power of motor

    Yes probably we can control the voltage at lower speeds we give low voltage and at higher speeds apply full voltage.
  2. E

    Peak Power and Nominal power of motor

    For electric vehicles how to apply peak power to achieve higher speeds.
  3. E

    Peak Power and Nominal power of motor

    Is it possible for me to trigger this peak with some switch etc to know if my peak performance is achieved or not? I think it is not possible. Why i am asking is, basically we can achieve higher speeds in vehicles based on throttle position without applying additional load.
  4. E

    Peak Power and Nominal power of motor

    I have a controller which can control the motor (BLDC). There are generally two ratings of the motor Nominal power rating and the Rated power rating (Peak power) for certain duration, for example 1KW (nominal) and 2KW (Peak). Now my question is if i want to attain the rated power rating 2KW, how...
  5. E

    Identifying the direction of rotation

    If I have a pot connected as below from a reference schematic, I want to understand the CW and CCW of rotation in software. The AVDD voltage is 3.3v, my understanding is when the voltage is increasing from 0V to 3.3V then it is clockwise and if the voltage is decreasing from 3.3V to 0V it is...
  6. E

    Measuring negative current

    I have one doubt in the below circuit, the circuit is for measuring the current I have not put in all the components, but the gain of the opamp is around 15. When the current is 0 i read at the output of the micro 1.65V. When the current is flowing from Point A to Point B the voltage at the...
  7. E

    Power supply with current output

    I know that if i have linear power supply of 0 to 5V, i can vary voltage from 0v to 5V. But do we have a power source which gives me current output instead of voltage from let us say 0amp to 5amp etc? I want to buy.
  8. E

    Circuit Clarification

    Is there any threshold value beyond which we can say it is invalid?
  9. E

    Circuit Clarification

    What does the below circuit represent I have not shown the complete circuit, but V_M1, V_M2, V_M3 are motor voltages, what information does REC_NEUTR give?
  10. E

    Calculation of motor speed

    I want to understand the equation and the numbers mentioned 65536 and 1024. How was it arrived? #define END_SPEED (END_SPEED_RPM * NOPOLESPAIRS * LOOPTIME_SEC * 65536 / 60.0)*1024
  11. E

    Calculation of motor speed

    I am sorry, the application is MCLV-2, the source code is the same for all of them, it is only configuration in userparms.h, i have not changed any of the configuration or source code. I am referring to AN1078 Demo ReadMe MCLV-2 with dsPIC33CK256MP506 Internal Op-Amp Motor Control PIM (MPLAB X)...
  12. E

    Calculation of motor speed

    I tried to add the zip file, but it says file too large. I have attached the screenshot of the source code i am referring.
  13. E

    Calculation of motor speed

    Any suggestions?
  14. E

    Calculation of motor speed

    This is the source of the application note from microchip AN1078 /* End speed converted to fit the startup ramp */ #define END_SPEED (END_SPEED_RPM * NOPOLESPAIRS * LOOPTIME_SEC * 65536 / 60.0)*1024 The formula looks like speed = 60 * f / p; One limited question generally why do we multiply with...
  15. E

    How to make transistor ON

    Sorry for missing critical information i am referring to an NPN transistor.
  16. E

    How to make transistor ON

    I want to know how to make the transistor "ON". If the Base voltage is greater than Emitter voltage by 0.7V is one standard way i know and with collector connected to VCC. One configuration i want to know is if the collector is connected to -VCC and the Base voltage is less than the Emitter...
  17. E

    Inductance of motor

    I am little confused here, the inductance is fixed independent of frequency, but the impedance is dependent on the frequency by jwL. So, the meter is measuring the inductance or the impedance?
  18. E

    Inductance of motor

    I want to know how to measure the inductance of the synchronous motor, I googled and found an LCR meter can be used. Is it correct? One other question is, i can measure the Line-Line inductance because they are only accessible points (R,Y,B). Can i assume that if L_line is the line inductance...
  19. E

    Circuit Analysis of Opamp Ckt

    Ok, i included the equations which includes the impedance, can you please confirm if it is ok to solve the equations?
  20. E

    Circuit Analysis of Opamp Ckt

    Thank you for the clarifications, but few clarifications before i attempt the problem, considering the impedance. Now i understand why i need to do the AC analysis since the input is not simple DC current they are sinusoidal phase current inputs. Few questions 1. If i do the AC analysis, do i...
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