Motor and ESC Theory - Current Draw 2 - Eng-Tips
2011年10月20日 · Drag force (at all speeds, remember) is 40N, giving 40A current draw from the motor. Now let's say I halve the duty cycle of the PWM, 50%, giving only an effective 12V to motor. This in turn decreases speed (20mph). Drag force though, stays the same, at 40N, so the motor, technically, still wants to draw 40A. What current does the motor ...
How to draw a 2-position selector switch and its contacts ... - Eng …
2017年11月28日 · ON-OFF-AUTO are ALWAYS ON1-OFF-ON2. That there are two N.O. switches is totally normal. One typically turns ON something like a PUMP directly and the other position turns ON a signal to a controller allowing it to turn ON the pump when needed. All the double toggle switches are the same ON-OFF-ON with the center contact the common.
Parallel Pumps - Pressure / Flow control - Pump engineering - Eng …
2004年11月15日 · Hello Looking at a pumping system comprising 3 VSD centrif pumps discharging into a rising main. Pumps can run either on their own or any 2 in parallel. I want to ensure that in parallel the load is shared and pumps run at same speed. To maintain a dedicated pressure in the main, is it best to...
Understanding 4-20mA inputs and raw values - Eng-Tips
2004年12月1日 · I am using an AB 1756-L55 ControlLogix 5555 Controller. It has a remote 1794AENT/A Adapter. I have an Analog Input Module - 1794/IE8 I have an Analog Output Module - 1794/OE4 My Analog Input Module is configured for (0-10V) / (0-20mA) My Analog Output Module is configured for 4-20mA
factors affecting maximum current surge from a pump motor
2003年5月7日 · But will never draw more than 3.1 A as the pump cannot load the motor more than 1/3 hp.[for 46 gpm and 5 ft height]. By the other hand, at the start the motor will draw about 50 A for milliseconds in any case. If the motor will continue to stay locked and the protection will not clear the fault in time the motor will be burned-out.
ABB Freelance 9.1 Control Emulator - Eng-Tips
2011年11月3日 · Hello! Hope this finds you well. I have received a Freelance ver9.1 software containing Control Emulator module. Would someone give a guideline (tutorial) for using it ? Even a link to learn more about ABB Control Emulator ? I'll be thankful.
Construction lines? - Siemens: Solid Edge | Eng-Tips
2008年11月17日 · I want to use construction lines to help with this, but am not quite grasping how to create these. Reading through the documentation, it sounds like I should be able to select a line (or some other 2D object) and just click the Construction button on the Draw menu to toggle it to a construction element.
Inverse time feed rate - Machines & Machining engineering - Eng …
2007年10月17日 · Most NC programmers think of the F-register in a CNC controller as the method for specifying linear velocity, i.e. uPM or uPR. This is true for two- and three-axis linear motion, but when rotary motion is to be controlled, the F-register takes on a different meaning.
Knurl Callout - Drafting Standards, GD&T & Tolerance Analysis
2006年12月15日 · I have checked the Machinery's Hanbook (Ed. 25) and there is a lot in regards to knurl tools and standard/ANSI requirements for the tools.
creating curves using data (radius, delta ect) - Eng-Tips
2006年10月5日 · Then I draw two circles at each end point with the correct radius, then another at the intersenction of those two circles. and trim out the curve. Seems other people are using another way to draw curves using maybe delta angle? how is another way to draw curves properly using either radius,length,bearing,chord distance, tangent, or delta angle ...