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 Robitronic

Pro-Master Manual

PC Software

25

Meaning of computed motor data

In the table under the graphical display, the first row depicts the individual values at maximum power
(MaxPow). In our example the maximum power (Power) is 215.8 watts, the RPM at maximum
power is 16.981, the torque is 121.6 Nmm, the efficiency is 67.5%, the motor current is 65.6
amperes, the motor voltage is 4.9 volts, and the time to reach maximum power is 0.50 seconds. The
next row shows the maximum efficiency with its corresponding values; in our example the maximum
efficiency is 77.6%. The row "MaxRPM" displays the maximum RPM with its corresponding values.
The last row in the table, "Average", shows the average values for power and efficiency; the average
power in our example is 147.8 watts and the average efficiency is 58.6%.
Maximum power is achieved at a certain RPM, while average power is a specification of the motor
that covers its complete RPM range.

To the right of the table with the maximum values there are some auxiliary data. The first row
indicates the battery simulation voltage of the test run. (Note that comparing different sets of motor
data only makes sense at the same simulation voltage.) The RPM value of 36.448 RPM is the
computed idle RPM of the motor without the load of the flywheel. "Torque" and "Current" reflect
the starting torque and the starting current or short-circuit current of the motor. "EMF" is a motor
constant with the unit millivolts per thousand revolutions. "Resist" is the internal resistance of the
motor (resistance of the windings and brushes); this allows identification of a motor winding.
"Friction" reflects the static friction in Nmm and the dynamic friction in Newton millimeter per
thousand revolutions; this friction results from the motor's bearing friction and the friction of the
brushes. The final row specifies the motor name, the winding, the date and the time of the motor
check. The values for EMF, Resistance and Friction are computed only if the program settings item
"Measure Auxiliary Data" was set to "Yes" (see page 28).
Pressing the control key [Ctrl] simultaneously with the key [D] allows you to toggle the display of
this auxiliary information. This also toggles the display of entered data such as brushes, springs,
timing or a remark.

Содержание Pro-Master

Страница 1: ...inter 11 Setting parameters for a motor check 12 Ending the motor check 14 Charging battery packs 15 Function diagrams 18 PC Software System requirements 20 Keyboard layout 20 Key to symbols 20 Installing the PC software 21 Connecting Pro Master to a PC 21 Selecting a function 22 Loading motor data 23 Display modes for motor data 24 Meaning of motor data 25 Loading benchmark data 26 Motor data in ...

Страница 2: ... for data transfer to a PC PC software for MS DOS Windows 3 xx and Windows 95 Evaluation on PC using graphics and tables Features of the charging function Battery pack charging function with temperature and delta peak cut off Linear and linear flex charging methods Charging current range 0 10 amperes set digitally Storage of five charging programs Scope of delivery Your Pro Master includes the fol...

Страница 3: ...d Pro Master message High Power In this case you must use a battery with less capacity Don t try a bigger one Safety precautions This device is not suited for use by children under the age of 14 The motor support must be placed on a slip proof surface out of the reach of small children The flywheel must be firmly attached to the motor armature by means of the hex Allen screws The safety guard for ...

Страница 4: ...he supply voltage with the battery clips of the Pro Master main unit See instructions on page 6 and the assembly sketch on page 7 Pro Master allows you to change the default parameters see page 12 such as battery simulation voltage and the default values can be reset by pressing the START key while connecting the supply voltage Pro Master keys and operation Description of keys Mode selection key S...

Страница 5: ...nction 2 Battery charging Main Menu 2 Charge Battery This menu item invokes Pro Master s battery charging program and allows you to charge batteries with a current of up to 10 amperes Pressing the Start key activates the charging function while the Mode key lets you move to another function 3 Pro Master setup Main Menu 3 Setup Master This menu item allows you to set the contrast of Pro Master s mu...

Страница 6: ...the motor mount and the flywheel should be 2 4 mm The sensor check should display a value of at most 30 for a silver field and at least 70 for a black field Next solder the red black motor cable to the test motor We do not recommend a plug connection because the motor s high starting current up to 120 amperes combined with the resistance of a plug connector would cause a measurement error Connect ...

Страница 7: ...aster helps you to determine the correct position of the test motor in the motor mount This function tests the distance between the flywheel and the RPM sensor this distance should be 2 4 mm For this test you need to turn the flywheel slowly by hand When a silver reflecting field passes the RPM sensor a value should be displayed of at most 30 and for a black field at least 70 ...

Страница 8: ...the Start key to begin measurement Motor Check Start terminate measurement Running Mode terminate measurement Measurement can be terminated at any time by pressing any key Motor Check Calculate Pass15 Next comes the calculation of the motor s characteristic curve followed by automatic display of maximum values see next section Display of motor data Starting another measurement Motor Check 2 Please...

Страница 9: ...return to sensor check High Power Mode return to sensor check If you use a big automotive battery and check a motor with 11 turns or less the power limit of the Pro Master will be reached Pro Master message High Power In this case you must use a battery with less capacity Don t try a bigger one We recommend a Panasonic lead acid battery Type LC RC1217PG 12 Volt 17 Ah Motor Check Start return to se...

Страница 10: ...y function Displays average power and efficiency Display of motor current table 20A 76 1W 60 3 Start return to function selection 29 879rpm 24 3N Mode next display function display next value Display motor data power efficiency RPM and torque in relation to motor current The current steps for the display can be set in the parameter setup function see page 13 Display of torque table 20N 65 9W 57 4 ...

Страница 11: ...lable as option and a printer cable Motor Check Start print data 4 Print Data Mode next function Print data Print Data Start print additional data Please Wait If in addition to the motor data you also want to print the current table and the torque table press the Start key again during printing Printing motor data Printing additional data ...

Страница 12: ...h no current flowing Since even under no load conditions some current flows in the motor maximum motor voltage drops by a factor of the motor current multiplied times 0 04 40 mΩ internal resistance of battery pack Current Limiter TestVoltage 7 5V Start return to function selection Current Lim 120A Mode next parameter change sensitivity Here the current limiter can be set between 50 and 150 Amps Ma...

Страница 13: ...ust also be considered for a measurement The value above is an average of various commonly available armatures The value should not be changed initially but can be adapted for special applications The factory setting is 4 20 x 10e 6 kgm2 Changing step values for current and torque table The motor s characteristic curve is displayed in the form of a current table and a torque table with 10 entries ...

Страница 14: ...ble entry Overview of table with default values No Default current Default torque 1 20 A 20 Nmm 2 30 A 40 Nmm 3 40 A 60 Nmm 4 50 A 80 Nmm 5 60 A 100 Nmm 6 70 A 120 Nmm 7 80 A 140 Nmm 8 90 A 160 Nmm 9 100 A 180 Nmm 10 110 A 200 Nmm Ending the motor check Motor Check Start return to main menu 6 Main Menu Mode next function This terminates the motor check function and returns to the main menu ...

Страница 15: ...on Main Menu 2 Charge Battery The charging function is selected in the main menu by pressing the Start key Selecting a charging program Charge Menu 1 Start Progr 1 This function invokes a battery pack charging program The and keys allow you to select from among five charging programs Pressing the Start key launches the charging program With menu item 2 Set up charge you can modify the charging pro...

Страница 16: ...time when discharging the battery pack For quick charging battery packs you should select a charging current between 3 and 6 amperes SANYO battery pack charging current 4 5A 5 5A standard 5 0 A PANASONIC battery pack charging current 4 0A 5 0A standard 4 5 A Settings for hobbyists Charging current 3 5 amperes Cutoff method peak 0 10V 10min Settings for competition Charging current 5 0 amperes Cuto...

Страница 17: ...eaking battery packs Setting the temperature charging method Progr 1 L 5 0A Temp 42C 3000mAh Selecting the temperature charging method Temp at the bottom left of the setup display allows you to set the cutoff temperature and the maximum charged capacity i e charging is terminated when the preset battery pack temperature or the preset charged capacity is attained If the temperature probe is not con...

Страница 18: ...Robitronic Pro Master Manual Operating Instructions 18 Function diagrams Pro Master function overview ...

Страница 19: ...Robitronic Pro Master Manual Operating Instructions 19 Pro Master function overview ...

Страница 20: ... J letter key1 key2 Two keys must be pressed simultaneously e g Ctrl D means that you press and hold the control key Ctrl and then key D function These functions in angled brackets can be selected from the menu with the mouse pointer or cursor keys Function keys F1 F2 F3 F4 F5 F6 F7 F8 F9 F10 F11 F12 Enter key Enter Control key Ctrl Cursor keys Cursor up Cursor down Cursor left Cursor right Paging...

Страница 21: ...rect the default parameters such as serial port and printer driver The parameters can be selected with the cursor keys and modified with the space bar Section Program Settings on page 28 provides a detailed description of the parameters You can operate the program with the function keys F1 F12 with a mouse or with the cursor keys The appendix provides a keyboard template that you can cut out and g...

Страница 22: ... and confirm your selection with the enter key Enter Another menu appears The cursor keys Cursor up and Cursor down let you choose the desired function Load Motor Data Load motor data from hard disk Save Motor Data Save motor data to hard disk Delete Motor Data Delete saved motor data on hard disk Load Benchmark Data Display stored motor data as benchmark broken line curve Clear Benchmark Data No ...

Страница 23: ...n be sorted by criteria such as motor winding RPM power efficiency and date In this example the motor data are sorted by Date Time as indicated by the angular brackets To sort the motor list by power use the keys Cursor down and Cursor right to select the word Power in the heading Press the Enter key to sort the motor list by power Select the motor 12x3 from the list and press the Enter key ...

Страница 24: ...and nondimensional RPM with function key F11 The view with nondimensional RPM assumes the maximum RPM to be 100 This simplifies the comparison of motors with different RPMs Select another mode using the menu item View RPM Default setting uses nondimensional RPM on the X axis ideal for graphical comparison of several groups of motor data RPM View motor data via RPM Torque Nmm View motor data in rel...

Страница 25: ... indicates the battery simulation voltage of the test run Note that comparing different sets of motor data only makes sense at the same simulation voltage The RPM value of 36 448 RPM is the computed idle RPM of the motor without the load of the flywheel Torque and Current reflect the starting torque and the starting current or short circuit current of the motor EMF is a motor constant with the uni...

Страница 26: ...et of motor data from the hard disk and display this for comparison as a benchmark Press function key F7 to display a list of motors Select motor 11x3 and press the Enter key The benchmark data are displayed as dotted lines In the table the benchmark data are displayed in the lower table Motor 2 ...

Страница 27: ...e with ten torque steps Torq Step and a table with ten current steps Amp Step are displayed For each current value the table shows the corresponding values for RPM power efficiency torque voltage and time where the values under M1 are for motor 1 and M2 for the benchmark motor The default values for the torque steps and current steps can be changed in the program settings see page 28 ...

Страница 28: ...s diagram and table Press function key F9 to print the diagram and the table The printer must already have been selected in the program settings see below Program settings Selecting the function Settings from the menu or pressing function key F12 allows you to change the program s default settings or your previous settings ...

Страница 29: ... Ctrl D Moment of Inertia The moment of inertia of the flywheel should be changed only if you use a different flywheel The moment of inertia is used for the computation of the motor s characteristic curve An erroneous value would produce falsified motor data The value for the supplied flywheel is 45 0 x 10 6 kgm2 The value for the armature 4 2 x 10 6 kgm2 corresponds to a model car If you measure ...

Страница 30: ...t Motor Check Starts the motor check and automatically transfers the data Read Pro Master Data The motor data are read from Pro Master If you carry out a motor check on the racetrack without a computer you can read and store the data with the computer at home Pro Master always stores the latest motor check Sensor Check This allows you to check the proper functioning of the RPM sensor ...

Страница 31: ...tor Manufacturer Motor manufacturer or name of motor Brushes Type of brushes Springs Type of motor springs Timing Present motor timing Remark Additional comment e g about the condition of the motor Date time Date and time of motor check are automatically saved File name The program automatically assigns a file name which you can change Data Directory The motor data can be saved in various data dir...

Страница 32: ...lectors This encumbers assessment of the measurement results If you check the motor with different timing settings with the PC we recommend using the best test result as the benchmark curve depicted as a dotted line Pressing function key F2 displays the present motor curve additionally for comparison On the next test run the new measurement results will be compared with the previous one The motor ...

Страница 33: ... optimal The motor timing is now advanced by one step Press function key F4 The motor check begins Curve1 Timing 2 0 solid line Curve2 Timing 1 5 dotted line The result is an increase in RPM power and efficiency The optimal timing is between settings 1 5 and 2 0 The motor timing is advanced by one step Press function key F4 The motor check begins Curve1 Timing 2 0 solid line Curve2 Timing 1 5 dott...

Страница 34: ... up Change diagram view of X axis Page down Change diagram view of X axis Ctrl D Toggle the display of auxiliary data Displaying measurement data as benchmark data Pressing function key F2 allows you to display the current measurement data additionally as benchmark data This function is particularly helpful in setting a motor s timing Changing the range of the X axis The Plus and Minus keys on the...

Страница 35: ...sults the voltage set for the motor check must be identical for the two sets of data A simulation voltage of 7 5 volts is preset corresponding approximately to a racing battery pack with 6 cells Technical note on motor checking Pro Master simulates a battery pack with adjustable voltage and constant internal resistance 40 mOhm 0 04 Ohm The resulting voltage curve on starting the motor corresponds ...

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