Industrial Project: Advice on very Reliable OEM Amp Modules (ICEpower, TPA3255, ...)

[JulianCo]

Hi everyone,

I am an electrical engineering student working on a rather specific industrial project. For this I would love to get some input from this community regarding extrem robust long-term reliable amplifier modules for tactile transducers in an industrial environment.

I am building an experimental machine for a dosing application using tactile transducers (exciters). I am planning to implement either one larger model (100W RMS) or two smaller models (50W RMS) in a parallel setup.


Currently, I am testing the following models:

• Xcite XBS100-4 Bass Shaker (4 Ohm, 100W RMS, 500W Peak)

• Xcite XBS50-4 Bass Shaker (4 Ohm, 50W RMS, 250W Peak)

• Reckhorn BS200i (4 Ohm, 100W RMS, 200W Peak)


The entire system is controlled by a PLC connected to an industrial microcontroller that generates a pure sine wave, allowing independent control of both frequency and amplitude.


The operating parameters are as follows:

• Low frequency application: 20-80Hz (Typically around 40-50Hz)

• Intermittent operation with demanding intervals of approx. 5 seconds "on" (sine wave with high initial amplitude, tapering down), followed by a short pause for container swapping.

• Daily usage: 8 hours per day, 5 days a week.

• Power Requirements: I am aiming for approx. 1x 100W into 4 Ohms or 2x 50W into 4 Ohms over the given intervall of 5s. I am currently testing different transducers to determine the required drive levels. To ensure maximum long-term reliability and thermal stability, I do not plan to exceed 60-75% of the rated RMS power during continuous operation.

• Load: tactile transducers / bass shakers

• Environment: Industrial control cabinet (stainless steel, 50x40x30cm, currently without ventilation but I am planning to reevaluate this).

Since this should become an industrial tool, I am looking for long-term stability, great thermal management, and comprehensive documentation (EMC/Safety pre-compliance) from a well-established manufacturer (preferably Europe) with long-term availability. The current budget which I’m planning with is around 250 Euro (Power Supply included).


My initial research points in the following directions:

• ICEpower modules like the 300AS1 or bigger: This is currently my top pick due to the excellent documentation (IEC 62368-1) and the fact that it is designed for pro-audio and touring, which implies good vibration resistance.

• Industrial grade TPA3255 modules: I really like these TI chips and think a single or dual chip design would be very appropriate for my use case, especially because I could use a standard industrial DIN-rail power supply. However, I am struggling to find a truly "industrial grade" module with proper documentation and guaranteed long-term supply.

I would appreciate any experience reports or recommendations for amplifier modules that fit this specific use case. Thank you!

 

[somebodyelse]

Maybe also look at Pascal amp modules. They're often used in pro audio, and last I looked they were pretty well documented.

 

[KSTR]

For industrial reliability very conservative derating is the way to go. For the 300AS1 that means no more than ~50Watts. Those modules are convection cooled, therefore mount them vertically or use a fan.
A 1200AS2 might look like overkill, but with proper derating applied it appears to be just right for your application. Of course with adequate heat-sinking.
Derating should also be applied to the transducers for long service life.

 

[Roland68]

Hi everyone,

I am an electrical engineering student working on a rather specific industrial project. For this I would love to get some input from this community regarding extrem robust long-term reliable amplifier modules for tactile transducers in an industrial environment.

I am building an experimental machine for a dosing application using tactile transducers (exciters). I am planning to implement either one larger model (100W RMS) or two smaller models (50W RMS) in a parallel setup.


Currently, I am testing the following models:

• Xcite XBS100-4 Bass Shaker (4 Ohm, 100W RMS, 500W Peak)

• Xcite XBS50-4 Bass Shaker (4 Ohm, 50W RMS, 250W Peak)

• Reckhorn BS200i (4 Ohm, 100W RMS, 200W Peak)


The entire system is controlled by a PLC connected to an industrial microcontroller that generates a pure sine wave, allowing independent control of both frequency and amplitude.


The operating parameters are as follows:

• Low frequency application: 20-80Hz (Typically around 40-50Hz)

• Intermittent operation with demanding intervals of approx. 5 seconds "on" (sine wave with high initial amplitude, tapering down), followed by a short pause for container swapping.

• Daily usage: 8 hours per day, 5 days a week.

• Power Requirements: I am aiming for approx. 1x 100W into 4 Ohms or 2x 50W into 4 Ohms over the given intervall of 5s. I am currently testing different transducers to determine the required drive levels. To ensure maximum long-term reliability and thermal stability, I do not plan to exceed 60-75% of the rated RMS power during continuous operation.

• Load: tactile transducers / bass shakers

• Environment: Industrial control cabinet (stainless steel, 50x40x30cm, currently without ventilation but I am planning to reevaluate this).

Since this should become an industrial tool, I am looking for long-term stability, great thermal management, and comprehensive documentation (EMC/Safety pre-compliance) from a well-established manufacturer (preferably Europe) with long-term availability. The current budget which I’m planning with is around 250 Euro (Power Supply included).


My initial research points in the following directions:

• ICEpower modules like the 300AS1 or bigger: This is currently my top pick due to the excellent documentation (IEC 62368-1) and the fact that it is designed for pro-audio and touring, which implies good vibration resistance.

• Industrial grade TPA3255 modules: I really like these TI chips and think a single or dual chip design would be very appropriate for my use case, especially because I could use a standard industrial DIN-rail power supply. However, I am struggling to find a truly "industrial grade" module with proper documentation and guaranteed long-term supply.

I would appreciate any experience reports or recommendations for amplifier modules that fit this specific use case. Thank you!

Wouldn't it be more sensible to use the appropriate products, including control and power electronics, from industrial applications, which have significantly longer service lives and are designed for continuous operation under such conditions?

This sounds like filling/bulk material handling systems.

There are also vibratory feeders for mechanical conveying systems. These directly transport the bulk materials.
You can find something like this under Electric vibrators / Vibration technology.

 

[JulianCo]

@somebodyelse Thank you! I will definitely look into the Pascal modules.

@KSTR I already suspected that I would need very conservative derating. Price-wise, this module would still be within my budget. I am also considering the ICEpower 700AS1 as a middle ground. By limiting the power to around 60-75W, this could be an option that keeps both the amplifier and the transducers well within their comfort zone for maximum longevity. Thanks for the estimation on the derating!


@Roland68
That is a very valid point. Using off-the-shelf industrial vibratory feeders would certainly be the "easier" or more established path, and I actually have such a system here for comparison. However, those components cost a multiple of what can potentially be achieved with professional audio gear and, in most cases, offer less flexibility in control.

I assume the systems you are referring to works with a AC electromagnet acting on an armature mounted on a spring-loaded chute. The AC magnet attracts the armature, and the restorative force of the springs returns it to the starting position. Most of these are designed as sub-resonant systems, where the mechanical resonance of the leaf springs and the tray is tuned slightly below the line frequency (50Hz or 100Hz in Europe) to work very power-efficiently. Amplitude is then simply controlled via phase-angle control (triac). Frequency-variable systems exist, but they require specialized frequency inverters which are quite expensive due to the relatively small market. Furthermore, operating at resonance transfers high forces to the base, usually requiring a complex two-mass vibration system to isolate the machine, which further drives up cost and complexity.

The system I am currently testing uses a different principle: the mechanical resonance of the guide springs is designed to be much lower than the operating frequency, and the springs have a much lower spring rate. This allows for very simple and independent control of both frequency and amplitude because the chute essentially "follows" the movement of the transducer. My initial tests were quite promising, showing a relatively quiet and flexible operation for precise dosing.

I started this as a "little fun project," but it is intended for internal use within our company. Since we might need several of these machines, the unit price is a significant factor. I want to develop this with scalability and industrial longevity in mind from day one. You are absolutely right that using a standard, field-proven industrial solution would be more sensible in a traditional sense. Those higher costs exist for a reason. But for this specific R&D approach, the flexibility and cost-effectiveness of my current solution seem like an interesting path that I would like to explore thoroughly.