[CC] DPS Digital Phase Shifter in a Demo Board & Testing with a Hioki CM3286-01

Подписаться 2,4 тыс.

Просмотров 16 тыс.

50% 1

Hi guys! In this video I installed a DPS, Digital Phase Shifter on a Do-It-Yourself demo board that I made, and tested it with a Hioki CM3286-01 AC Clamp Power Meter. The DPS is a single-phase to three-phase converter. It allows you to run a 3-phase motor out of the available single-phase power supply. The DPS unit model is an MY-PS-2, rated for 1Hp, 220V 3-phase, which is a match for my 1Hp, 3-phase Meiji induction motor. The objective of installing the DPS on a demo board was for me to have 3-phase voltage available for testing purposes, not necessarily for motor control. The DPS did output 3-phase voltage, but it has certain limitations which I discussed in the video. I provided timestamps for easy navigation to topics/chapters. The DPS device is made in Korea.
If you find this useful, please consider subscribing. Thanks for your support and stay safe!
timestamps
00:29 Function of the DPS
01:00 Simple design no moving parts/switches
01:49 DPS rating must match motor rating
02:00 Retail box and user's manual
02:22 DPS connection on demo board
03:07 Time lapse- making the DPS D.I.Y. demo board
05:02 DPS use for 3-phase motors only
05:26 Q&A note 1- single phase output without motor connected
05:55 Q&A note 2- unbalanced output voltage with motor running but not loaded
06:16 using Hioki CM3286, testing output voltage without motor (open ciircuit)
07:58 using Hioki CM3286, testing output voltage with motor running unloaded
10:01 actual output voltage unbalance, unloaded motor
10:39 using Hioki CM3286, testing output voltage phase sequence
13:12 Pros & Cons, closing thoughts

Наука

Опубликовано:

16 июл 2024

Ссылка:

Скачать:

Готовим ссылку...

Добавить в:

Мой плейлист

Посмотреть позже

Комментарии : 43

@albertgng2916 2 месяца назад

Thank you very much for the information, I thought about buying the equipment to test frequency converters in my laboratory but it will definitely not help me, a great contribution, greetings from Peru

@ramschannelreviews 2 месяца назад

Glad the video was useful to you. Have a great day, people of Peru!

@GAMAZ7 2 года назад

Excellent is precisely the information I was looking for, I congratulate you for your work!! Greetings from Mexico

@ramschannelreviews 2 года назад

Thanks a lot for your support and comments.

@mystified4074 Год назад

Great review. Nice work, I appreciate the detail. Thanks

@ramschannelreviews Год назад

I appreciate your comments. Thanks for your support!

@kyruskabamalan5293 2 года назад

As usual to every uploaded videos sir Ram, very informative content to sir! Looking forward to see more videos from your channel 😀

@ramschannelreviews 2 года назад

Thanks sir Ky. Ingat po kayo!☺️

@reneacobausa7010 Год назад

good morning sir i like how you explain on your demo very clear and i understand good job.

@ramschannelreviews Год назад

Thanks sir for your comments. I appreciate your support!

@tomsuica8731 5 месяцев назад

I love how you bend your wires. Some of them may be bent past the maximum bend radius though.

@ramschannelreviews 5 месяцев назад

I appreciate the heads up on bend radius, Tom. Thanks for watching!

@abdulkhaliqelectricion1320 Год назад

excellent

@ramschannelreviews Год назад

I appreciate your support!

@KC1959iowa 3 месяца назад

Thank you for the video, I have a question for you. With no motor hooked up the DPS outputs single phase, two wires have power going out. When a 3 phase motor is powered on single phase, 2 wires having power to it, the third wire on the motor will output power ( like a motor for a rotary phase converter ). When you checked voltage with the motor running how do you know the DPS was putting out 3 lines of power? Couldn't it still be putting out single phase ( two lines ) and the third line was incoming power from the motor that showed your voltage reading?

@ramschannelreviews 3 месяца назад

You made an interesting observation. I appreciate it. This somehow reminded me of an open-delta transformer. As you know, a 3-phase motor will not self-start on single phase power. This one does, even though only single phase voltage is output by the DPS when no motor is connected. It would seem that the DPS designers have some sort of proprietary circuit in the DPS that supplies the missing 3rd phase as soon as it detects the presence of a 3-phase motor winding. How do I know? In a practical sense, when I tested the phase sequence with a Kyoritsu KEW2062BT, I got a proper indication of a 3-phase power supply coming out of the DPS. Here's a link to that: ru-vid.com9j-Jbf1WRZ4?si=5fTlC0W0KsAkt7fE I cannot, however, cite formulas or EE principles in support since only the DPS manufacturer really knows what's going on at the DPS.

@vivekkumar-hp5yq 4 месяца назад

great review. I believe that there is only one capacitor placed inside the phase shifter.

@ramschannelreviews 4 месяца назад

Thanks for your insights. I appreciate it.

@bigtimlikewhoa Год назад

Hello! Excellent video! Question. Will this Digital Phase Shifter work for an industrial fan application with a 1hp 3-Phase motor? My concern is if the fan blades would provide enough load to balance the voltages across the legs, since they're not balanced when the motor is unloaded. The blade on this fan is about 30 inches diameter. Would you recommend this for a fan application?

@ramschannelreviews Год назад

Thanks for watching! The printed notice on the box says it's best for 1Hp motor, so on paper it should be able to handle the 1Hp 3-phase fan motor (220V, 60Hz). I have not tested it though. My suggestion, if possible, connect a 3A single phase breaker at the input side of the DPS before operating the 3-phase fan load. (746W, 1Hp/220= 3.3A) The breaker should at least provide over current protection in case excessive current unbalance occurs while the fan is running.

@bigtimlikewhoa Год назад

@@ramschannelreviews Thank you for your reply. So just making sure, connect the 3A single phase breaker at the input side of the DPS? Would there any benefit on installing another 3A breaker (3 phase) on the load/output side of the DPS?

@ramschannelreviews Год назад

@@bigtimlikewhoa Thanks for your interest in this matter. I have to caution you though that I am not expert on DPS. So please take my opinion with a grain of salt. At the 3-phase side, the load current is not 3A but 2.2A (assuming pf=0.85). The obvious benefit of a 3-phase breaker is that it becomes the overcurrent protection and disconnect device. I am not certain however, how this 3-phase breaker would respond to the current imbalance of the DPS. You may want to consult with an electrician on this matter.

@kramerfab 4 месяца назад

Ram, have you tried other similar products that have less imbalance?

@ramschannelreviews 4 месяца назад

Hello E.K. no I haven't found one yet with less imbalance.

@user-hj2yw1un4i Год назад

hi siir! my question is, is it posible to use this device (DPS) for aircon 5TR? thanks for your answere? Godbless

@ramschannelreviews Год назад

Hello po! I wouldn't recommend it primarily because I don't run my DPS on a loaded motor. So I don't have enough data in this regard. It's only for providing 3-phase voltage for my test instruments. For a 5 ton HVAC equipment you'd expect to draw around 17kW of power. Although the DPS manufacturer offers a unit for that size I'd advise you to talk to your electrical contractor whether it's safer & more practical to just apply for a 3-phase electric service. Thanks for your support.

@harryocampo1939 2 года назад

Hi sir, how about the current output of the motor? Tama po ba sa rating while running? Thanks

@ramschannelreviews 2 года назад

Hello sir, may I clarify first. I had not loaded the motor due to restrictions on my test. I just let it run without load for the main purpose of getting a 3-phase supply for testing my DMMs and clamp meters. The voltage unbalance at the output of the DPS with unloaded motor running was what you see in the video. The 3-phase motor line currents were: 1A, 3.8A, & 2.7A without load- also unbalanced. While the rated LOAD current of the motor at 220V is 3.5A. As you can see, Line 2 (3.8A) was already at the rated load current due to voltage unbalance. Unfortunately I could not test my motor at its rated load at this time so I can't check the manufacturer's claim that voltage and current will just balance out when the motor is loaded. I would suggest that you also read reviews on amazon about the DPS as a lot of users share their experience while using the DPS with a loaded motor. Thanks for your support!

@BloodCover Год назад

Are both wires on the top of the phase shifter hot wires 120v each or is one a ground wire

@ramschannelreviews Год назад

Both are hot wires in my case since that's our residential utility service voltage configuration: 230V, 60Hz, single phase nominal.

@BloodCover Год назад

@@ramschannelreviews this is excellent video, thank you for the reply, I’m going to copy exact setup you have, I have a 5hp 3 phase motor on a jet pump which is used for high volume and high pressure In irrigation and or water supply, I have two uses one for irrigation let it run wide open, I have a vfd as well to use when running it on a pond fountain, I only need 1.5 hp to do the pond really well, I picked this pump up for 80$ used and retail is over 2,000, thank you for this video

@ramschannelreviews Год назад

@@BloodCover Glad you found it useful. Just as a reminder, do check the compatibility of ratings of the DPS with your motors and have over current protection as well. Thanks for your support and appreciation. You got a great deal on that pump. Good luck!

@cartvincentpalaypayon4396 Год назад

Can I use that on forward reverse control And wye delta control?

@ramschannelreviews Год назад

No. This DPS simply converts single phase to 3-phase by electronic means. It has no mechanical parts or switches. Thanks for watching.

@adambergmann7716 10 месяцев назад

can this be used to run a vfd that will run the motor?

@ramschannelreviews 10 месяцев назад

Nowhere in the user's manual that I have and in their website was a VFD setup used in an example, so I don't think so. If you wish you may contact the manufacturer, Myung Youn, directly to be sure. Thanks for watching!

@mkacytchannel Год назад

Hello sir is it applicable to PMSM motor 3 phase .38 HP

@ramschannelreviews Год назад

Hello po. Sorry I have not handled a pmsm motor. It seems it needs precision control. Baka hindi sya pwede sa DPS. Ingat po.

@mkacytchannel Год назад

Thank you for the advise.

@earlmiller6093 Год назад

Hello, I have DPS and it does the same as your test shows on the voltage imbalance…. I am disappointed however in my unit… it claims to have excellent start up torque….But it won’t start my machine unless it is in low speeds. It doesnt seem to have good start up torque as claimed. I run a 3 hp motor on a milling machine. I have to start it in low speed 1st and once running then I can turn my variable hand crank to maximum speed. It makes it difficult if I forget to turn it back to low speed before shutting machine off because machine needs to be running to change speeds. My speed change is done via 2 pulleys opening/closing while running only.

@ramschannelreviews Год назад

Hi Earl, I believe this is one of the compromises of running the DPS. At least you did not burn out your motor, as happened with other users. I understand the inconvenience. In my case I only wanted a three-phase voltage for my test equipment. But the DPS, as you discovered, will not provide 3-phase voltage unless there is a 3-phase motor load *and it must be running.* May be you can place a sticker to remind you to change speed before turning it off?

@MrVozka Год назад

Anyone running a 7.5 hp compressor with this

@superturkeylegs Год назад

I'm not sure, but I'm sure a retrofit would be possible. You'd have to check if the motor on the compressor is compatible with this device. The same goes for VFDs, digital phase converters, and rotary phase converters. I've also seen static phase converters based on capacitors and various electrical wizardry far beyond my paygrade. My understanding is that digital phase converters and VFDs are generally the best options in terms of efficiency.